This is nbc nightly news. Reporting tonight from washington, peter alexander. Good evening. It may be one of the most critical moments of the 2016 campaign. Fbi agents today interviewing Hillary Clinton behind closed doors for more than three hours. All of it part of that investigation into clintons use of a private email server while secretary of state. This news comes just weeks before clinton is set to officially become the democratic partys nominee. Nbc news just wrapped up our own exclusive interview with clinton, and while her Campaign Says todays fbi meeting was voluntary and that clinton has repeatedly denied any wrongdoing, the email issue gets to the heart of one of clintons biggest liabilities, that many people dont trust her. Nbcs Kelly Odonnell now with the latest. Reporter outside Hillary Clintons washington, d. C. , home, a small motorcade pulled away just after 7 30 this morning. Clintons destination . Fbi headquarters, where she answered investigators questions for 3 1 2 hours. Her campaign called the meeting a voluntary interview about the email controversy that blew up more than a year ago over her use of a homebased private server and the handling of classified material while secretary of state. Late today secretary clinton spoke exclusively to nbcs chuck todd. I will continue to, you know, be as forthcoming as i can, and my answers that i first gave more than a year ago i stand by. Reporter just three weeks before her partys convention i am so grateful to you reporter clinton is eager to put the controversy behind her, but political damage has already been done. Inflaming existing voter doubts about clintons trustworthiness. There are enough questions republicans have about her honesty, her character, or judgment. This will continue to be her great weakness. Democrats ignore that, but for republicans, thats a big deal. Reporter ready to exploit it the rnc blasted clinton calling her fbi interview unprecedented for a major party candidate. Donald trump took to twitter, boldly predicting criminal charges and adding what bill did was stupid. That refers to the private airport meeting bill clinton had with attorney general Loretta Lynch this week. Hillary clinton declined to call that meeting inappropriate. Hindsights 20 20. Both the attorney general and my husband have said that they wouldnt do it again. Reporter with todays interview secretary clinton said shes happy to assist the Justice Department with finishing up its review. She also told chuck todd shes been given no assurance, not about the timeline for when the probe will be concluded or what the outcome would be. Would there be any kind of criminal charges or would the Justice Department find that no laws were broken. Peter . Kelly odonnell outside the Clinton Family home here in washington. Kelly, thank you. And tomorrow morning on meet the press, chuck todd will have much more of his exclusive interview with Hillary Clinton. While clinton was meeting with the fbi, donald trump was having a closed door meeting of his own with the potential running mate today and facing new criticism for another controversial message on social media. Coun katy tur is in new york right now. Reporter good evening. Donald trumps veep rumors are heating up today meeting with indiana governor mike pence at his golf course. Both pence, new Jersey Governor Chris Christie and former House SpeakerNewt Gingrich are all among the top contenders for the running mate slot, each being formally vetted. Now all would give trump much needed legislative experience but none more so than gingrich with his deep ties to washington. But the former speaker told nbc news the veep rumors are pure speculation. This is all up to donald trump. Hell pick who he wants. Hell pick it based on what he wants both to win the election and to govern. Reporter trump meeting a positive news cycle but stepping into controversy again tweeting an image of Hillary Clinton among 100 dollar bills and what looked like the star of david with the caption the most corrupt candidate ever. He deleted that tweet but not before accusation was of antisemitism. Nbc news has reached tout to the campaign but has not heard back. Police in bangladesh ended a hostage siege by terrorists in that country today. The 20 captives including 1 american and 2 Police Officers were killed along with 6 of the attackers. We get the latest tonight. Reporter after a terrifying allnight siege, over 100 bangladeshi troops stormed the building at first light. This amateur video capturing the raid. Whoa. Reporter look closely. The unidentified man with the backpack appears to be holding a weapon. A separate video showing Armored Vehicles ramming down the walls. Moments later an armed team rushes in. Inside, a gruesome discovery. The bloodied bodies of 20 hostages brutally slaughtered with sharp weapons. Bangladesh has seen acts of terror before, but nothing like this. It started friday evening in one of dhakas most secure neighborhoods, just a mile away from the u. S. Embassy, when attackers stormed a local restaurant frequented by foreigners. They entered in a blaze of gunfire. Among the dead one american citizen, nine italian, seven japanese. Three of the victims attended american colleges including this young undergrad, enrolled at emory university. Isis claimed responsibility for the carnage, releasing photographs of only five men it says were the attackers, but authorities in bangladesh, who have long denied the groups presence in the country, say six were killed, one captured. Isis in bangladesh, what they call the caliphate of bangladesh has had their coming out. They have now brought themselves from a small group that was killing individuals to the international stage. Reporter these have been Turbulent Times for a troubled nation. A spike in islamists have some foreigners, religious minorities and secular activists, a pattern of terror now taken to the next level. Bangladesh has declared two days of mourning. That countrys Prime Minister now pledging to fight the Terror Threat at all costs. Peter . Lucy kafanov in london. Thank you. After the latest round of terror attacks in bangladesh and istanbul and the orlando nightclub massacre just three weeks aek, authorities here on high alert as tens of millions of americans are hitting the road. We have this report. Reporter the nations largest city and busiest airports, heavily guarded by armed officers. You know, i think it feels more secure, it really does. Because i dont have eyes in the back of my head, but it does feel good to know that theres someone watching and looking out for us. Reporter k9s at l. A. X. Where a record 1. 2 million travelers this weekend. We flew earlier this morning to beat the rush. Reporter authorities at many airports will be in and out of yuniform. Youll have behavior detection in this area and local Law Enforcement working with dhs for a presence out there and the Airport Police as well. Reporter at jfk airport in new york, travelers say theyre not afraid. So this isnt stopping you, fear isnt stopping you. It is not. We live with the way the world is today and live with the risks and what happens. We go about our living and live our lives and travel and do what we do. Reporter while many are focused on terrorism in the sky, the real threat may be in the car. July 4th being one of the deadliest days on the road. Packed highways slowed down by accidents like this one in florida where a bus and semitruck collided killing five people and injuring 25 more. The tallahassee democrat capturing the aftermath. Ive never seen anything of this magnitude, especially this number of fatalities. Reporter on the road or in the air, a call for caution and security as we remember our freedoms. Isis has warned of attacks at airports like jfk, but several Authorities Say there are no known or credible threats. Still, theyre asking anyone who is moving through highly trafficked areas like this to remain extra vigilant, peter. Morgan radford, thank you. Severe weather including flash flooding is a possibility in parts of the midwest and the plains this weekend. For the forecast, we want to get right to dylan dreyer. Dylan . Good evening, peter. Were watching a flood threat through the middle of the country this Holiday Weekend. We have flash flood watches that include wichita, kansas city, extending over to st. Louis. We could see as much rainfall rates as much as 1 to 2 inches per hour in this area through monday. Because of this stationary front these areas of low pressure just riding along it, it will keep the rain in the same areas over and over again from sunday through monday, too. Thats why we could see some brief flash flooding. We are going to see the rain start to spread farther to the east through the ohio river valley, even making its way into the washington, d. C. , area through the day on monday with scattered showers off and on throughout the day and a chance of thunderstorms for the fireworks later on that night. That will be an area where things arent looking all that great through this weekend. We can see as much as 3 to 4 inches of rain but 5 to 8 inches possible. Elsewhere across the country, good across the northeast through sunday. Down south its hot and humid. Temperatures will be close to 100 degrees. Then on the fourth of july itself, were going to see again those showers across the midatlantic but elsewhere looking pretty nice for the fourth of july. Peter . All right, dylan, thank you very much. Tonight the world is mourning the death of one of the great humanitarians of our time. Elie wiesel survived the holocaust and later helped the world confront the horror and pain of that tragedy. He taught generations about not being silenced in the face of injustice. He was called a messenger to mankind, the survivor of the nazi extermination camps. Elie wiesel witnessed the worst of humanity and later dedicated himself to making the memory of the holocaust eternal and speaking out against inhumanity everywhere. Efforts that in 1986 earned him the nobel peace prize. We must speak. We must take sides. For neutrality helps the oppressor never the victim. Born in romania he was a teenager when he and his family were deported to auschwitz. His mother and younger sister were sent to the gas chambers and killed. This picture shows wiesel who was later taken to buchenwald where he watched his father starve to death. His camp was liberated by american troops in 1945. He first returned to auschwitz nearly 35 years later to confront his memory. I was literally taken from my books which speak of humanism and beauty and truth into the kingdom of hell. Until his death, wiesel taught about depair, warning about the perils of indifference and partnering with Many National leaders and celebrities to focus on injust and suffering like the victims of war in the former yugoslavia and the tragedy in darfur. No one has taught us more than elie wiesel. His life stands as a symbol. His life is testimony that the human spirit endurs and prevails. A passionate supporter of israel, wiesel wrote more than 50 books. His most famous night a haunting chronicle of his holocaust experiences. A traumatized generation that often felt abandoned by god and betrayed by mankind, and yet i believe that one must not estrange oneself from either god or man. He built the elie wiesel to foundation for humanity, even though the organization lost most its money to Bernie Madoffs ponzi scheme in 2008, he vowed to carry on his life work teaching new generations about a dark passage in history and imploring them to never forget. And one more moment in the life of wisconsin elie wiesel, at the white house he implored president reagan not to visit a German Military cemetery where nazi war dead are buried. Wiesel said, that place, mr. President , is not your place. Your place is with the victims of the ss. President reagan still went, but he added a visit to the bergenbelsen concentration camp. Elie wiesel dead tonight at the age of 87. Still ahead a program that encourages young people to keep the peace in your Car Insurance policy is 22 pages long. Did you read every word . No, only lawyers do that. So when you got rearended and needed a tow, your Insurance Company told you to look at page five on your policy. Did it say great news. Youre covered on page five . No. It said, blah blah, blah blah blah blah blah. The Liberty Mutual app with coverage compass makes it easy to know what youre covered for and what youre not. See Car Insurance in a whole new light. Liberty mutual insurance. Is it keeps the food out. For me before those little pieces would get in between my dentures and my gum and it was uncomfortable. Just a few dabs is clinically proven to seal out more food particles. Super poligrip is part of my life now. Hey, ready foyeah. Big meeting . Uh, hello . A meeting . Its a big one. Too bad. We are double booked diarrhea and abdominal pain. Why dont you start without me . Oh. Yeah. If youre living with frequent, unpredictable diarrhea and abdominal pain, you may have Irritable Bowel Syndrome with diarrhea, or ibsd. A condition that can be really frustrating. Talk to your doctor about viberzi, a different way to treat ibsd. Viberzi is a Prescription Medication you take every day that helps proactively manage both diarrhea and abdominal pain at the same time. So you stay ahead of your symptoms. Viberzi can cause new or worsening abdominal pain. Do not take viberzi if you have or may have had pancreas or severe liver problems, problems with alcohol abuse, longlasting or severe constipation, or a blockage of your bowel or gallbladder. If you are taking viberzi, you should not take medicines that cause constipation. The most common side effects of viberzi include constipation, nausea, and abdominal pain. Stay ahead of ibsd. With viberzi. Were back tonight with what could become a National Model for helping young people stay away from Violent Crime and get their lives on track. This is going on in Northern California in a city that was beset by murder until this controversial but Effective Program began. Nbcs Steve Patterson reports tonight on the remarkable change. [ sirens ] reporter this was what anyone heard about richmond, california. An Industrial City known for gangs, drugs and, most of all, murder. Its always been homicides in richmond. Reporter but five years ago a radical new idea to save lives. What were doing is very comprehensive. Reporter Community Activist created a mission to bring down the murder rate. Identify young men in richmond who run the risk of being involved in Violent Crime and offer an alternative. The program, partially funded by tax dollars offering mentoring, employment help, even trips outside the city. Most of these young men are waiting for us to show up. Are waiting for a responsive, credible, legitimate opportunity. Reporter 68 men have participated, 64 are still alive. And the number of murders has been dropping from 47 in 2007 to 21 in 2015. Boegen and his team keep their fellows anonymous even to the police, but its almost as controversial as it is effective bus what the program doesnt do is ask anyone to put down their guns. Instead, they offer up to 1,000 if fellows stay out of trouble and reach personal milestones. Did you do it for the money . No. I did it to help myself. Reporter former fellow Ronal Robinson spent his life in and out of prison before joining up. How did you feel like this program has influenced you . If it wasnt for the program, id probably still be running around the streets doing a whole bunch of stuff. Reporter boegen is now focused on helping other cities adopt the richmond model. It works. Its keeping young men alive, and its a lot less costly than gun violence in this city. Cool, cool, cool. Reporter a radical approach that many here say is working. Steve patterson, nbc news, richmond, california. Up next, the latest from florida on the water emergency ruining this Holiday Weekend for many ruining this Holiday Weekend for many peop ruining this Holiday Weekend for many when a moment turns romantic why pause to take a pill . Or stop to find a bathroom . Cialis for daily use is approved to treat both erectile dysfunction and the urinary symptoms of bph, like needing to go frequently, day or night. Tell your doctor about all your medical conditions and medicines, and ask if your heart is healthy enough for sex. Do not take cialis if you take nitrates for chest pain, or adempas for pulmonary hypertension, as it may cause an unsafe drop in blood pressure. Do not drink alcohol in excess. Side effects may include headache, upset stomach, delayed backache or muscle ache. To avoid longterm injury, get medical help right away for an erection lasting more than four hours. If you have any sudden decrease or loss in hearing or vision, or any symptoms of an allergic reaction, stop taking cialis and get medical help right away. Ask your doctor about cialis and a 200 savings card. Geico motorcycle, great rates for great rides. The possibility of a flare was almost always on my mind. Thinking about what to avoid, where to go. And how to deal with my uc. To me, that was normal. Until i talked to my doctor. She told me that humira helps people like me get uc under control and keep it under control when certain medications havent worked well enough. Humira can lower your ability to fight infections, including tuberculosis. Serious, sometimes fatal infections and cancers, including lymphoma, have happened; as have blood, liver, and nervous system problems, serious allergic reactions, and new or worsening Heart Failure. Before treatment, get tested for tb. Tell your doctor if youve been to areas where certain fungal infections are common, and if youve had tb, hepatitis b, are prone to infections, or have flulike symptoms or sores. Dont start humira if you have an infection. Raise your expectations. Ask your gastroenterologist about humira. With humira, control is possible. The course of outrage is growing in florida tonight with hundreds of people voicing anger and frustration on this crucial weekend for tourism. The culprit, a toxic algae bloom thats led to a state of emergency across parts of floridas coast. Nbcs Gabe Gutierrez now with that story. What do we want . Clean water. Reporter today along floridas treasure coast, anger. We want our water back. Its summer. The fourth of july weekend. Reporter as a wretched foulsmelling algae bloom takes over. Its putrid. This is sad. Its heartbreaking. And its devastating to our economy. Reporter its been described as redecember belling guacamole, although a lot less appetize. Researchers say in large quantities it can cause skin rashes and if ingested, even liver failure. The governor has declared a state of emergency as it has spewed downstream. Scientists havent pinpointed exactly whats causing it but among the factors could be warmer temperatures and heavy rains this year. These demonstrators in Martin County want the government to buy land south of the lake to store excess water. They blame the sugar industry for pollution and fueling the bacteria, which is now attracting the attention of environmentalist erin brockovich. This is our environment. This is water. It is the necessary element to sustain all of us. And its just gotten ludicrous that we continue to do this. Reporter in a written statement, u. S. Sugar has said sugar cane farmers are reducing pollution not increasing it and to say otherwise is simply irresponsible and a slap in the face to the communities that rely on farming for jobs and security. At lake okeechobee, controlling excess water has been a challenge for decades ever since a massive hurricane killed 2,000 people in 1928. Farther south in Palm Beach County would you let your kids swim in this water . Absolutely. Reporter tourism officials are insisting the beaches are safe 50 miles from the toxic algae. They say the current is in their favor. Were looking forward to welcoming visitors this weekend and during the rest of the summer. Reporter but tonight other coastal communities arent so fortunate. More than a Holiday Weekend ruined, an ecosystem at risk. Gabe gutierrez, nbc news, stewart, florida. When we come back right here, the american who brought right here, the american who brought down one of Terry Bradshaw . What a surprise you know what else is a surprise . Shingles. And how it can hit you out of nowhere. I know. I had it. Cmon lets sit down and talk about it. And did you know that one in three people will get shingles . all no. Thats why im reminding people if you had chickenpox then the shingles virus is already inside you. all oooh. Whos had chickenpox . Scoot over. And look that nasty rash can pop up anywhere and the pain can be even worse than it looks. Talk to your doctor or pharmacist. About a vaccine that can help prevent shingles. Fight heartburn fast. With tums chewy delights. The mouthwatering soft chew that goes to work in seconds to conquer heartburn fast. Tum tum tum tum. Chewy delights. Only from tums. The sunll come out for people with Heart Failure, tomorrow is not a given. But entresto is a medicine that helps make more tomorrows possible. Tomorrow, tomorrow. I love ya, tomorrow in the largest Heart Failure study ever. Entresto helped more people stay alive and out of the hospital than a leading Heart Failure medicine. Women who are pregnant must not take entresto. It can cause harm or death to an unborn baby. Dont take entresto with an ace inhibitor or aliskiren. If youve had angioedema while taking an ace or arb medicine, dont take entresto. The most serious side effects are angioedema, low blood pressure. Kidney problems, or high potassium in your blood. Tomorrow, tomorrow i love ya, tomorrow. Ask your heart doctor about entresto. And help make tomorrow possible. Youre only a day away finally tonight what is easily one of the biggest upsets in tennis history. An american who started playing the game when he was just 4 today knocking off the topranked player in the world, stunning himself and the crowd at wimbledon. Heres kelly cobiella. Novak djokovic goes out of wimbledon. Reporter a win no one saw coming. The 28th seed, american sam querrey, quashing world number one Novak Djokovic three sets to one. Serving up an astounding 31 aces. Last month djokovic became the first man in more than 40 years to hold all four major titles at once. Last years wimbledon and u. S. Open, this years australian and french titles. A record 30 straight wins in grand slam singles matches. Few thought hed lose here especially this early. The 66 querrey blasted djokovic with serves up to 134 miles an hour. In an on again off again rain delay match over two days. Querrey calling his surprise win incredible and djokovic one of the best players ever. Congratulations to sam. He played a terrific match. He serves very well as he usually does and he just overpowered me. Reporter as always, gracious in defeat. And for his opponent, a stunning triumph. Kelly cobiella, nbc news. Notice everybody will be talking about sam querrey. Thats nbc nightly news for this saturday. Im peter alexander. Reporting tonight from washington. For all of us here at nbc news, thanks for watching. Have a good night. Nbc sports, home of the 2016 rio olympics, the nhl, premier league, the nascar chase for the sprint cup playoffs and primetimes number one show, sunday night football. Only on nbc. The sands of daytona beach, where 70 years ago nascar was born. Tonight drivers like the daytona 500 champion, denny hamlin, return. He has a win. Dale earnhardt jr. Does not. Kyle busch smiles because he does. Tonight greg biffle says that you have to drive through me. He is on the pole. Tonight they race for glory. They race for their season. They race on nbc