Good evening on this fourth of july. We begin this holiday with severe storms and a nation on high alert. These images just coming in. Reported tornadoes, a dark wall of clouds in kentucky. And near charleston, west virginia, this walmart in kentucky badly damaged by the storm. Torrential downpours blinding drivers in the midwest. And at the same time, police are out in force from coast to coast, ahead of the festivities tonight. The nypd deploying the Largest Police detail ever on the fourth of july. Ginger zee has the holiday forecast in a moment. But we begin tonight with abcs phillip mena. Reporter tonights severe storms marching across kentucky, sending trees into homes. Dangerous displays lighting up the night skies, alongside the fireworks this holiday weekend. Lightning setting homes ablaze. In plano, texas, homeowners salvaging what they could after this strike. Another bolt sparking a fire at an apartment complex near dallas. And suddenly, there was a bolt, i never heard such a large bang in my life. Reporter its all part of a wave of storms punishing the planes and now marching east. In colorado, hail the size of golf balls shattering windows. I thought there was a tornado coming. I ran to the windows and the hail was just blausting through the windows. Reporter from nine inches of rain in kansas to this twister in still water, oklahoma. State troopers there searching tonight for a woman after her car was swept away in floodwaters. Across the country, another threat. 16 wildfires raging across eight states. Some officials warning backyard fireworks scout easily spark fires, because conditions are bone dry. Whether its fireworks or lightning, the threat of fires is a major concern tonight. Here, it was a Lightning Strike that destroyed this apartment building. But thankfully, cecilia, everyone was able to escape safely. Phillip, thank you. Lets get right to abc chief meteorologist jiginger zee. The storms are pushing east, so people wont see the fireworks show. Reporter yeah, we have the clouds here ahead of the storms to the south and west. The rain were going to get is relatively besign. The storms to the southwest that im concerned about. The hail in the Northern Plains and the area in kentucky. We saw the latest pictures in, from the severe thunderstorms and reported tornadoes. You have that severe thunderstorm watch for the next couple of hours. Let me take tow the next threat. Thats the rain that comes through. We stopped it at fireworks tonight. Parts of virginia, west virginia, going to see the heavier downpours. New york city, still going to inhibit you a little bit. Minneapolis tomorrow, in the heart of it. Enhanced threat area, hail and damaging wind, the main threat. Cecilia . Ginger, thank you. The country is on high alert, and washington, d. C. Security teams are out in force at the national mall. A Record Number of people traveling today, and police at Traffic Control centers on the lookout for trouble. Abcs linzie janis and the millions of families on the move tonight. Reporter across the country, millions of americans are gathering to celebrate the fourth. And tonight, police on high alert for anyone or anything suspicious. Boston taking no chances for its famed boston pops concert. Law enforcement keeping a watchful eye. We have the capabilities to adapt and adjust and get cameras there in a moments notice. Reporter standing guard in new york city, a counterterrorism command center, monitoring 9,000 cameras. At the click of a mouse, we can move from camera to camera. Reporter up to a Million People expected to come out and watch the show here. Here in new york city, these are some of the thousands of officers who will be patrolling during tonights fireworks display. New this year . A team of docks now specially trained to sniff out explosives on a moving target. We live in very dangerous times. The public depends on us. And we depend on you. Reporter bag checks and body scans, a given for the half Million People expected at Chicagos Navy Pier and d. C. s national mall. Where we found the national guard. People there reminded that its a no drone zone. Cecilia, hundreds of thousands of people are gathering along new yorks east river. Authorities here and across the country are asking crowds to be extra vigilant tonight. Cecilia . Linzie, thank you. Now, to that mystery explosion in new yorks central park. A teenage tourist losing part of his leg after stepping on a moment head device. Authorities revealing new clues tonight. That explosive material found in a plastic bag. Abcs Mara Schiavocampo has more. Reporter tonight, the nypd searching for answers about the mysterious object exploding in central park, and the motive for leaving it behind. I refer to them as an explosive hobbyist or an experimenter. Si believe we have someone who made this material and then he wanted to test it. Their backyard is central park. Reporter the material now being tested at a forensics lab. The sound of sundays blast caught on camera. After an 18yearold virginia tourist set off the explosion, simply by jumping off some rocks. Moments later officers Reporter Police and the bomb squad rushing to the scene. It sounded like a cannon. So, thats why i thought it was like a fourth of july thing. Reporter the victims friends caught in the chaos right after the blast. We dont know what happened. There was a small explosion and then then dust. Then dust. Beyond the caliber of fireworks, just based on what we heard. Reporter the victim, a college student, has now had part of his leg amputated. Officials say the three tourists are not suspects, and there is no indication of terrorism. But there are still many unanswered questions. The best case is that somebody was terribly irresponsible in putting together chemicals that they knew could hurt somebody. Worst case is perhaps somebody planted this with an intent to hurt people on a very busy holiday weekend. Reporter the victims family says he is in serious but stable condition. As for the investigation, Officials Say the lab results for the explosive material will be back later this week. Cecilia . Okay, mara, thank you. And to the race for the white house now, donald trump caught in the middle of a twitter firestorm once again. This is the tweet at the center of it, Hillary Clinton calling the use of that star ant antisemitic, but late today, trump doubling down, calling her the most corrupt candidate ever. Heres abcs mary bruce. Reporter tonight, donald trump on the defensive over this image. A tweet showing what appears to be the jewish star of david over a backdrop of money, labeling Hillary Clinton the most corrupt candidate ever. Critics say it smacks of antisemitism, but trump is pointing fingers, tweeting the Dishonest Media is trying their absolute best to depict a star in a tweet as the star of david rather than a sheriffs star or a plain star. On cnn, a top trump aide vouching for the candidates character. There is nothing antisemitic about our campaign. Certainly nothing antisemitic about mr. Trump. Reporter but no explanation of how the Campaign Came across that image, which was previously posted in a white supremacist chat room. Its now been changed, the star replaced with a circle. Trump has tried to embrace the Jewish Community in the past im a negotiator like you folks. Were negotiators. Reporter noting his family connection. My daughter, ivanka, is about to have a beautiful jewish baby. Reporter but tonight, the Clinton Campaign is calling trump out, for using a blatantly antisemitic image from racist websites to promote his campaign. They say its part of a pattern. But now, trump firing back, saying thats ridiculous, and that clinton is just trying to divert attention away from her email scandal. And mary bruce joins us now from washington. Mary, those conventions just weeks away, and youre now hearing some more about some vp picks . Reporter yeah, both candidates auditions potential running mates. Julian castro, if picked, would be the first hispanic on the president ial ticket. Donald trump has been meeting with mike pence, and just today, with iowa senator joanie ernst. Trump tweeting earlier that the only people that are not interested in being his vp pick are the people who have not be asked. Cecilia . Mary, thank you. We want to turn overseas now, to a growing wave of deadly terror attacks. Three suicide bombings reported in saudi arabia in the last 24 hours. In iraq, ten People Killed today in baghdad. Thats a day after the deadliest bombing there in nearly a decade. In just the last week, major attacks in four countries, killing more than 230 people. Abcs alex marquardt, here he is on isis calling for even more violence before the end of are ramadan. Reporter a Suicide Attack tonight in saudi arabia, next to islams second holiest site. One of three attacks in that country in just the last 24 hours, including one near the us consulate in jeddah. They cap off a spectacularly bloody week, as the muslim hold will month of ramadan ends. In baghdad, isis claimed the massive bombing that took the lives of 167 people, the deadliest attack in wartorn iraq in nearly a decade. It was 1 00 a. M. , when explosives in a truck ripped through a busy neighborhood. The flames consuming shops and restaurants that moments earlier had been full. Parents out with their kids, celebrating ramadan and the end of the school year. Isis has suffered huge setbacks in iraq and syria, losing longheld ground and forces. But those losses somewhat offset by dramatic terrorist attacks. 44 killed last week at turkeys main airport. Then 20 mostly foreign hostages killed on saturday in a restaurant in bangladeshs capital. Among the dead was faraaz hossain, who studied in the u. S. , and whose family says the attackers let him leave, but he refused to abandon his friends. Isis is still able to terrorize and inspire around the world. Cecilia . Alex, thank you. Now, to italy. And the growing mystery surrounding the death of an american student. 19yearold beau solomon was found dead shortly after arriving in rome for a study abroad program. His body pulled from a river today. Abcs Gloria Riviera has the latest on the investigation. Reporter tonight, a deadly mystery unfolding in rome. 19yearold american beau solomon, found dead in a river today. Described by family as a star student at the university of wisconsin, stellar athlete and a proud cancer survivor. Had over 15 to 20 procedures growing up throughout his life and was able to overcome all that. Reporter solomon had just arrived in italy as part of a Summer Exchange program. His school in rome saying he was last seen in a pub with friends early friday morning. And then, he vanished. His roommate alerting the university when solomon failed to show up later that day for orientati orientation. Desperate for answers, his family flew to italy on sunday to work with authorities. Italian news reports said solomons brother say he was found with a large wound on his head, blood on his shirt, his wallet and cell phone missing. There are also reports, not confirmed yet by police, that there were credit card charges made on both solomons cards after he vanished. His parents have identified the body. They are working with police and authorities at the u. S. Embassy in rome to try to find out how this cecilia . Glory ya, thank you. And that statele of emergency in florida, kaulsed by that toxic invasion. Beaches closed for the holiday because of dangerous algae spreading in the water. It smells as bad as it looks, if not worse. And the rest of the summer is now in jeopardy. Abcs eva pilgrim on how long think could last. Reporter marine is closed, beaches empty on this holiday weekend. Toxic algae has turned these normally bustling south florida destinations into ghost towns. Cant get in the water. Its terrible. Reporter floridas governor declaring a state of emergency in four counties, temporarily closing several beaches along the Treasure Coast because of encroaching pools of algae. Smells like a Public Toilet or something. Reporter this living green slime is an assault on all the senses. Smells like death. Dead, rotten fish. Reporter people are complaining of headaches, respiratory issues and even rashes since the algae arrived. Red eyes, scratchy throat. It can be bad. Reporter the blooms can contain dangerous bacteria and authorities are investigating reports of serious infections. The problem started here in lake okeechobee more than two weeks ago to prevent flooding, authorities started releasing water from the lake into canals that unleashed that algae on the coastline. In recent years, dangerous algae blooms have flourished in lakes around the country. Experts say farm fertilizer runoff is largely to blame for the problem. There has to be someone some place that should be able to do something about it. Reporter authorities in florida now scrambling to figure out howl to clean all this up. Authorities have not given a definitive timeline on when they will clean this up. As you can see, cecilia, the algae is still here. It sure is. Eva, thank you. And there is still much more ahead on world news tonight on this fourth of july. A fireworks disaster. What happened when one of them landed inside this home. And a controversial takedown. Turn to your left. Or your right. Turn to your right. The 911 call that led to this. Why police now admit they had the wrong man and are apologizing tonight. Had the sh, burning of diabetic nerve pain, these feet were the first in my family to graduate from college and trained as a nurse. But i couldnt bear my diabetic nerve pain any longer. So i talked to my doctor and he prescribed lyrica. Lyrica may cause serious allergic reactions or suicidal thoughts or actions. Tell your doctor right away if you have these, new or worsening depression, or unusual changes in mood or behavior. Or swelling, trouble breathing, rash, hives, blisters, muscle pain with fever, tired feeling or blurry vision. Common side effects are dizziness, sleepiness, weight gain and swelling of hands, legs, and feet. Dont drink alcohol while taking lyrica. Dont drive or use machinery until you know how lyrica affects you. Those who have had a drug or alcohol problem may be more likely to misuse lyrica. 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Stay active with boost®. Afdave stops working, but his aleve doesnt. Because aleve can last 4 hours longer than tylenol 8 hour. What will you do with your aleve hours . Next tonight, to the foreign businessman in ohio wearing a traditional robe and head scarf falsely accused of being a terrorist. A call reporting him to 911 prompting a police takedown and that triggered international outrage. Heres abcs clayton sandell. There is a male in a full head dress. Reporter this 911 call to police in avon, ohio, now triggering an international response. With multiple disposable phones, pledging his allegiance, or something, to isis. Reporter a desk clerk working at this Fairfield Inn Hotel tells her sister she believes theres a terrorist in the lobby. That sister calls police. There he is. Get on the ground grab his hands, cuff him up. Do not move take that phone away. Reporter the suspect is ahmed al menhali. I am tourist. This not good. Yeah, its not good, thats right. Reporter but soon police realize the report is false. He was visiting the u. S. For a heart treatment, suddenly faints. You okay . Reporter groups that track islamophobia say the u. S. Is seeing a recent spike. Anger sometimes directed against ne innocent muslims. Marriott, which owns the hotel, says it was a terrible misunderstanding and Hotel Employees will be getting training in diversity and inclusion. Avons police and mayor are sorry, too. There were some false you a cue sagss made against you and those are regrettable. Reporter as for that hotel desk clerk, Officials Say she may be facing criminal charges over that false report. Cecilia . Clayton, thank you. When we come back, a nasa nailbiter. A spacecraft speefding towards jupiter. The big question, at 215 times the speed of sound, will they be able to slow it down in time . And the new golden boy. Steph currys new teammate. Will the warriors now be the best nba team ever . Hey, ready for the big meeting . Yeah. Uh, hello . 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Fireworks in one neighborhood in seattle flew into this house, setting it on fire. The home, a total loss. On average, fireworks cause more than 4,300 structural fires on the fourth of july. And one of the best basketball teams in the country is about to get even better. Kevin durant signing with the golden state warriors. Espn reporting the twoyear contract is worth more than 54 million. Durant becomes the highest paid player on the warriors, and joins superstar mvp steph curry. Now, to a historymaking moment of truth in space. Nasas unmanned juno spacecraft on an adventure to jupiter, five years in the making. And it all comes down to the next few hours. The mission will slingshot by the massive planet at a recordbreaking 165,000 miles per hour. Thats fast enough to fly around the earth in nine minutes. And when we come back, if you need a quick History Lesson in American History this fourth of july, well, step right up. This guy is not selling any lemonade this holiday. 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Sfx crowd cheering sc johnson finally tonight, a History Lesson on this fourth of july, and it only costs 25 cents. The little boy behind it all is america strong. Heres abcs john donvan. Reporter its july. Its hot. A kid in jackson, michigan, has got a stand. So, easy guess what hes selling, right . Not so easy. Because heres what a quarter gets you. Lyndon b. Johnson took over his place. Reporter yeah. Its history that Gabe Fulmerhouser is selling, or more specifically, answers to history questions. Its important to everyones life and how america became america. Reporter because gabes 8, and hes been boning up on this stuff for awhile now. Well, since he was 3. Well, since i have so much knowledge that i cant be a history teacher, i just came up with this. Reporter of course, the books help. Plus, some customer service. They swooped in and attacked. They usually may me a quarter or more. If they pay me more, i tell them a lot. Reporter well, look at his takings. Hes getting customers, including, his mom says, kids his own age. He would like to be a soldier, too, some day. You know, maybe make some history himself that kids would want to sell instead of lemonade. John donvan, abc news, washington. Thank you for watching on this fourth of july. Im cecilia vega. For david and all of us, have a great holiday. And we leave you with this is jeopardy here are todays contestants a Video Production specialist from reston, virginia. A stayathome mom from kirkland, washington. And our returning champion, a public historian from washington, d. C. Whose oneday cash winnings total. And now here is the host of jeopardy alex trebek thank you, johnny gilbert, and thank you, ladies and gentlemen. Happy fourth to all of you. Ive got my red, white, and blue on. I hope you have yours also. Justin, liz, and zach zach knows how to celebrate the fourth, picking up a lot of cash yesterday. But lets party right now. Lets play the game