Good evening as the last days of summer wore down, wherever americans gathered over this past Holiday Weekend on beaches, boats, blankets, front porches, and when the conversation turned serious, its about the sensation that our world is falling apart. The number of hotspots around the world right now is bracing. A lot of them, but not all in the middle east. A lot of them but not all have to do with radical islam. And tonight the u. S. Is forced to react to the execution of yet another american. While we will not air it here tonight, it took place on camera. The radical group isis has killed another prisoner, another american journalist. After his mother delivered a public plea to spare her sons life. Its where we begin on this tuesday night with our chief Foreign CorrespondentRichard Engle on the Syrian Border with turkey tonight, richard, good evening opinion. Reporter good evening, brian. Isis released a video, it is very disturbing, it hasnt yet been verified by u. S. Intelligence, but it does appear to show the execution of journalist steven sotloff. The video shows sotloff begging for his life, reading a statement, and i must say, he appears very brave right until the end. Steven sotloff sat calmly as he waited to die. The 31yearold reporters voice never broke, as he read a statement, a knife held by his throat. His executioner apeered to be the same mill tan the who beheaded james foley two weeks ago. This is james wright foley. Reporter the same voice, the same heavy british accent. Todays video suggested a british hostage could be the next to die. Just last week, sotloffs mother begged for this not to happen. Bring him home safe and sound and to hug him. Reporter she appealed politely, even respectfully to the isis leaders to have mercy on her son. I ask you to be merciful and not punish my son for matters he has no control over. Reporter they showed no mercy. Now the video is evidence. U. S. Intelligence will break down all of the tactical elements of this video to try to understand whos behind this execution, where they might have been located, what the timing was. All of these pieces fit in to create a broader intelligence picture of what isis is doing. Reporter the militants still hold at least two other americans, their fate unknown. Sotloff was a freelance journalist from florida, he worked for a variety of publications, including time magazine, these videos are meant to be gruesome, they are meant to be terrifying, they also attract recruits. Brian . Richard everything emstarting us off tonight from the Syrian Border. The debate is now raging over what to do, how to reresponded to the threat of isis, say nothing of those other hotspots in the rest of the world. And the news overnight that u. S. Forces carried out a military operation on yet another terrorist battleground. That part of the story tonight from nbcs andrea mitchell. Reporter terrorists attacking this Shopping Mall in nairobi last september, killing 67 people. A somali based affiliate. Monday their leader was targeted near mogadishu. Intelligence cant say whether they got him. Jihadi social media sites say he was injured not killed. Beyond somalia, islamic extremists are posing a global threat. Isis militants in iraq and syria gaining ground. Libbals two years after benghazi. Militants kidnapping hundreds of girls in nigeria, a cautious president obama asking advisers in he takes military action, what happens the day after. The president s got a real dilemma, its hard to imagine hes going to solve this complex problem with u. S. Military air power. The white house is expected to announce the president is sending up to 300 more troops to iraq, to protect the u. S. Embassy and the baghdad airport. All of these threats dont approve the one he could take kiev in two weeks if he wanted to, even as the president heads to europe. Facing Global Threats on all sides, brian. Nbc news andrea mitchell, thanks. The cdc has issued a desire new warning about the ebola epidemic. Its now spreading faster than all efforts to stop it. In a moment, well show you the first interview with the american physician who survived ebola and is now telling his story for the first time. As we learn another doctor is overseas. Our report tonight from our chief medical editor dr. Nancy snyderman. This latest american missionary was treating pregnant women in a liberian hospital. We need action now to reporter this morning on today, strong words from centers for Disease Control director dr. Tom frieden, who just returned from liberia. We have the worlds first epidemic of ebola, and its spiraling out of control. The situation is bad and it looks like its going to get worse quickly. Reporter 10 far this outbreak has killed 1500 people. More than 3,000 have been infected and the World Health Organization estimates that number may top out at as many as 20,000. In liberia 90 doctors care for over 4 million people, and the already fragile Medical Center is in trouble. This man carried through a market in search of food. Health workers had to chase him down and force him back into an ambulance to return him to the hospital. The fear is so great, president obama today sent a message directly to the people of west africa. Along with our partners around the world, the United States is working with your government to help stop this disease. Reporter u. S. Health officials continue to say ebola is not a threat to this countrys sophisticated health system, this rapidly spreading disease requires a Global Response now. Today the first three of 20 healthy american volunteers were reported to have been given the first dose of an experimental vaccine you can the kind of vaccine that will prevent ebola. This is the first test of its kind in human beings. This is not going away any time fast, brian. Sadly it is not. Dr. Nancy snyderman starting off our coverage on this tonight, thanks. As promised, the american doctor who was reported to be near death with ebola, when we watched him walk into that atlanta hospital. His first interview about his incredible story, which he once thought he might not live to tell, and matt lauer tells us tonight about this extraordinary conversation. Reporter brian, good evening, im here in asheville, north carolina, this is where dr. Kent brantley and his wife have been in seclusion since he was released a short time ago. We sat down for an exclusive interview. It was together that we learned one of his dearest friends, another doctor serving where he was serving in liberia, has now contracted the virus. I was notified about that this morning. And spent a good long while in tearful prayer. You have become an expert in recognizing the symptoms. You had become extremely familiar with the progression of those symptoms, which takes us to july 23rd. July 23rd, you wake up, take me through the day. I woke up that morning, and really i just felt a little off. A little warm, a little under the weather. I took my temperature and it was 100. 0 i think. And your family was thousands of miles away. And you knew they couldnt come back . I was so thankful that amber and the kids were not there. That would have been an overwhelming mental burden if i had woken up sick laying in bed next to my wife with one of my children snuggled up next to me. Fortunately for the doctor, his wife and two children had left liberia three days earlier to attend a wedding in texas. When he did call to tell me he had ebola, i dont know if i can describe that. I was i knew what was coming, i had seen him treat these people who had already been diagnosed, i knew how it ends. I knew how everyone had ended up so far. So i had the disadvantage of having the knowledge of the course of the disease. And i was scared. There was a time during those days in liberia, where you were really sick that doctors didnt think you would make it through one of those nights. Were you aware of that . Yeah. Did they talk to you about it . I dont think they ever said kent i think youre about to die. But i felt like i was about to die. And i said to the nurse who was taking care of me, im sick, i have no reserve, and i dont know how long i can keep this up. I thought, im not going to be able to continue breathing this way. And they had no way to breathe for me if i had quit breathing. Reporter dr. Brantley says hes still weak but hes improving every day. He wants to tell his story so americans wont forget the terrible situation that is taking place in liberia. Will he go back . Thats a decision theyll make down the road. Remarkable recovery indeed, much more of matts interview with dr. Brantley tomorrow morning on today and a special hour from nbc news friday night 10 00 eastern time. Here in new york tonight, confirmation from the family regarding the condition of joan rivers whos been reported to be in a medically induced coma following an out patient procedure last week. Stephanie gosk has more for us. Stephanie, good evening. Reporter the legendary comedian has been here at mt. Sinai for the last five days with her family not releasing a lot of detail until today her daughter Melissa Rivers confirming that the situation remains very serious. In a statement, she wrote. We are extremely grateful for all the love and support weve received. At this time she does remain on life support. I know my mother would be overwhelmed by the continued outpouring of kindness, and i want to thank everyone for keeping us in their prayers. Since she arrived here, social media has completely lit up with messages from fans, friends and fellow comedians. All hoping brian that some of that tenacious spirit that joan rivers is known for, helps her pull through this. Stephanie gosk, outside the hospital in manhattan. Thanks. When First Responders cant respond in time to save a life. A growing problem on roadways across this country. Protecting my future. Thank you for being my hero and my dad. Military families are uniquely thankful for many things, the legacy of usaa Auto Insurance could be one of them. If youre a current or former military member or their family, get an Auto Insurance quote and see why 92 of our members plan to stay for life. So factors like diet can negatively impact good bacteria . Even if youre healthy and active. Phillips Digestive Health support is a duoprobiotic that helps supplement good bacteria found in two parts of your digestive tract. Im doubly impressed phillips Digestive Health. A daily probiotic. When folks think about wthey think salmon and energy. 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We are back tonight here with an issue we all need to be more aware of. Most folks dont spend a lot of time thinking about First Responders until they need one. When you do, when you need help, when someone is trying to get to you, seconds feel more like minutes going by. And in our modern era, many things have conspired to make it worse. Congestion, volume, cell phones, headphones, distractions of any kind. Wait until you see the consequences. We begin our two part report tonight with tom costello. Reporter from boston to chica chicago, orange county, california to montgomery county, maryland hes having trouble breathing. Reporter we rode along as firefighters and paramedics lost precious seconds behind drivers who wouldnt budge or were stuck in gridlock. This is an area that gets a little congested for us too. Reporter in lake forest california, paramedic engine 29 sees it every day, critical seconds and minutes that eat into arriving at a fire or medical call within 4 to 8 minutes. Boston engine trapped behind a city bus after the driver stopped at a 7eleven. Ladder 26 stopped cold for 28 seconds in congestion. A slow march through downtown chicago. For 30 seconds this driver in maryland would not get out of the way for a paramedic unit. It matters because a fire can double in size in just one minute. And an extra 30 seconds to a cardiac case can mean brain damage or death. Response times under five minutes translate into fewer deaths. A 2012 utah study found an 8 increase in fatalities within one day in response. A life could have been saved had they only gotten there sooner, the trouble, more people, more cars, more drivers, more texting and talking, more gadgets. Weve definitely seen our response times increase over the years, because people are distracted. Reporter some drivers simply dont want to yield. Joe finn. Unless its affecting them, they dont actually take it too seriously. Reporter in a business where every second counts, the people on the front lines say its taking longer to get there. Tom costello, nbc news, boston. In tomorrow nights report, why so many people panic when an Emergency Vehicle is suddenly on their tail, especially inside cars that are built for quiet on the inside. Another break and were back in a moment with another midair emergency involving passengers getting way too close for comfort. For over a decade, doctors have been prescribing nexium to patients just like you. For many, prescription nexium helps heal acidrelated erosions in the lining of the esophagus. There is risk of bone fracture and low magnesium levels. Side effects may include headache, abdominal pain, and diarrhea. If you have persistent diarrhea, contact your doctor right away. Other serious stomach conditions may exist. Avoid if you take clopidogrel. Nexium 40 mg is only available by prescription. Talk to your doctor. 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On the night of his surprise upset, House Majority leader eric cantor told his supporters in virginia, i look forward to continuing to fight with all of you for the things we believe in for the conservative cause, end of quote. Apparently he will lead that fight from inside the confines of a wall street bank. Cantor has signed on as vice chairman and manager director of a Boutique Investment Bank with plans to open a washington office. Brad pitt and Angelina Jolie made it official. The brides wedding gown is getting a lot of attention, not so much for the color, but how the versace gown incorporated their childrens drawings in the veil. As for the groom it turns out he was wearing a tie that belonged to his son after the groom forgot to pack his own. The Long Distance journey that has allowed one family to un lock whats going on inside their son with autism. An amazing story when question come back here tonight. [ telephone rings ] [ shirley ] edward jones. This is shirley speaking. How may i help you . Oh hey, neill, how are you . How was the trip . [ male announcer ] with nearly 7 million investors. [ shirley ] hes right here. Hold on one sec. [ male announcer ]. Youd expect us to have a highly skilled call center. Kevin, neill holleys on line one. Ok, great. [ male announcer ] and we do. Its how edward jones makes sense of investing. Has a new easytoswallowes coating. Se of investing. So the nutrients for your eyes, heart and brain go down easier. For a limited time, get your fourdollar coupon at centrum. Com. Ugh. Heartburn. Did someone say burn . Try alka seltzer reliefchews. They work just as fast and taste better than tums smoothies assorted fruit. Mmm. Amazing. Yeah, i get that a lot. Alka seltzer heartburn reliefchews. Enjoy the relief. Welllllllll, not when your . Travel rewards card makes it so hard to get a seat using your miles. Thats their game. The flights you want are blacked out. Or they ask for some ridiculous number of miles. 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Side effects may include allergic reactions, injection site pain, fatigue, uti, painful urination,. And difficulty emptying your bladder. Tell your doctor about your medical history, muscle or nerve conditions, and all medicines especially botulinum toxins, antiplatelets, and blood thinners,. As these may increase the risk of serious side effects. Ask if botox® can help calm your bladder. Visit botoxoab. Com to find a botox® urology specialist. Finally here tonight we mentioned at the top of the broadcast, considering the world is falling apart or seems to be these days. Lets end on a terrific story. For so many parents who have children with autism, its about finding a way to open them up. Just like what happened to the young man youre about to meet. We get tonights story from kate snow. Reporter for mike bran began running has been as natural as breathing. He stood up and started running. Reporter something wasnt right. He would run into the walls and fall and not put his hands down. Reporter diagnosed with autism, he wouldnt talk unless prompted. One day on the monkey bars a breakthrough. He was hanging there and he said, help me. And i fell to my knees. I started crying in the car. I knew that everything was going to be okay. Reporter a couple years later, his father brought him to a running club and mike took off. The coach came up to me and said, this guy can run. I always want to go faster. Now a senior, mike brahney began is ranked one of the top ten runners in the country. I have to do some things to slow him down. He wants to go faster. Go mike go. Reporter this june he ran a 4 07 mile. The sport has transformed his academics and given him confidence. Are you friends with your teammates . Yeah, im friends with them. We have a good time. Zhou think autism makes you a better runner . A better person. Reporter a better person . Every time i brought him to a race or practice, he was just a regular kid. All the other stuff that goes on, everything goes away when hes running track. A few hundred colleges have reached out. Georgetown, syracuse, wisconsin. Reporter to succeed, hell need academic support, but mike has even bigger dreams. The olympics. You think you can do it . I can do it. How cool would that be . That would be awesome. Reporter kate snow, nbc news, north port, new york. That is our broadcast for this post labor day tuesday night. Thank you for being here with us as we begin a new week and a new season. Im Brian Williams we hope to see you right back here tomorrow evening. Good night. Celebrity marriage palooza. The first photos now on extra. Mr. And mrs. Pitts first kiss as husband and wife. Who made angies gown and why brad had to wear his sons tie. Why Donny Wahlberg brother missed the wedding. Plus the i dos to wade. Who was the super star wedding singer. And joan rivers eerie joke about her health just hours before her surgery. We have the latest from new york as the stars pray for joan. I believe in the power of prayer. Then jennifer lawrence, kate upton, the stars fighting back over their stolen sexy selfies. Whose are real and whose are fake. Plus dianes sawyers successor of world news tonight. Now on extra from Universal Studios hollywood, the entertainment capital of