welcome to "world news tonight." the gripping video and new eyewitness accounts from that frantic zoo emergency. a 4-year-old boy plunges into the gorilla enclosure. the 400-pound animal grabs him and runs off. >> mommy's right here. >> tonight, what zoo workers say they had to do to keep the boy alive. neighborhood shootout. >> get in your house. >> two gunmen start firing in the middle of a residential area. at least eight victims shot, one killed. the intense hunt to take down the shooters. breaking news. shark attack. a boy bitten in shallow water. how the entire beach came to his rescue. deadly flooding. record rain over the holiday weekend. mandatory evacuations under way. families pulled from flooded homes. the danger at some beaches this memorial day. and, driven to distraction.

a bus driver caught in the act. driving on the highway while watching a program on his smartphone. good evening. thanks for joining us on this sunday. i'm tom llamas. we begin with the scary scene at the cincinnati zoo. dramatic video of the boy in the clutches of a 400-pound silverback gorilla. zoo workers forced to shoot the gorilla. marci gonzalez on the zoo defending its actions. >> reporter: tonight, a young boy recovering after coming face to face with a 400-pound

gorilla. >> i'm right here. >> reporter: for more than ten minutes, onlookers, including the boy's mother, watch in horror after authorities say the boy crawled through a barrier, plunging ten feet into the moat below. you can see the gorilla's left arm make contact. lifts him up, sweeps him across the water. >> the gorilla rushed the boy, but didn't hit him. he was almost guarding, protecting him. >> reporter: holding the boy between his legs, a zoo working takes aim, shooting and killing the silverback. rescuers rushing in, pulling the boy to safety. while the zoo

gorilla exhibit is closed. protesters outside questioning why the worker didn't use a tranquilizer. >> in an agitated situation, it may take quite a while for the tranquilizer to take effect. >> reporter: the family also saying the boy is home from the hospital, and in their words, doing just fine. >> thank you. now to breaking news in houston. the deadly shooting rampage. eight people shot, at least two killed, two officers among the wounded. here's phillip mena. >> reporter: a quiet holiday weekend shattered when gunfire erupts in an upscale houston neighborhood.

two people down. >> reporter: 10:15 a.m. two gunmen armed with ar-15 rifles open fire in the streets, blowing out car windows, igniting a gas station. >> do we believe this is just one or do we think we have two shooters? >> reporter: residents told to stay in their homes as a gun battle raged outside. >> get in your house! >> reporter: video shot from a nearby church. the first officer on the scene shot several times. s.w.a.t. teams and a police chopper move in. gunmen firing on that chopper, even hitting homes. >> female was shot in the leg. >> reporter: one woman shot in her car, another driver killed. a boy scout giving first aid to a wounder officer. >> i asked him to remove his vest, and once he had done that, i wrapped up the wound.

>> reporter: eight shot in all. bullets coming just inches from this man. >> it went through that door and then it came through the back seat. >> reporter: night -- right now, police searching for a motive. tom? >> phillip, thank you. and we have breaking developments coming in from florida. a shark attack reported off neptune beach in the northeast section of the state. a young boy bitten. here's aditi roy on beach goers coming to the rescue. >> reporter: a boy attacked by a shark. police say the middle school-aged boy was swimming when a shark bit his right leg. officials say the boy has

least two severe lacerations, down to the bone. this comes as experts predict a hike in shark attacks. 98 attacks in 2015, including 6 fatalitie fatalities. and this, two weeks ago in florida, a two-foot nurse shark still attached to this woman's arm. the beach still open, and the boy recovering. aditi roy, abc news, san francisco. and to weather this memorial day weekend. dozens rescued, several dead or missing. to the east, bonnie losing team as it spins over south carolina. life guards warning about dangerous riptides. here's eva pilgrim.

>> reporter: tonight, extreme weather pummeling northern texas. no relief in texas after almost 20 inches of rain forced evacuations driving families from their homes near houston. the swollen bravos rivers, seen here from space, now expected to crest over 53 feet. >> i didn't know it was going to come up this fast. >> reporter: at least five dead and three still missing, including an 11-year-old boy in kansas. search teams recovering the body of darren mitchell, a national guardsman who posted this chilling photo on facebook just minutes before his truck was swept away. >> it disappeared. once it flipped, you didn't see tires, truck, nothing. it just tumbled over. >> reporter: out east, it was tropical storm bonnie lashing the coast. eight inches of rain submerging cars and making for a dangerous drive along i-95 the biggest worry now, rip currents from florida to north carolina where one swimmer was rescued, but another is still missing. >> if you float out of it, you can tak

and swim in. >> reporter: here you can see just how quickly a swimmer can get pulled from shore. it looks calm right now. >> looks can be deceiving. >> reporter: it may look like a good dayt on the water, but it' still dangerous. eva pilgrim, abc news, south carolina. >> thank you. let's get right to rob marciano. can you fill us in? >> well, some of the moisture will stream to the northeast. it's been very, very summerlike, but it will knock down some of the temperatures. it's not moving much. we look for it to continue to sit there, spin up showers and storms. flooding could be an issue. and the moisture up i-95, new york to boston, pretty good chance of rain. an t

in the great lakes. storms across the plains, including the flood zone, should be dry on the west coast. have a safe and respectful memorial day. >> thanks. back at home, now to the race for president. donald trump appealing to america's veterans. speaking in washington, to the rolling thunder motorcycle group. here's devin dwyer, with the trump campaign in washington. >> reporter: tonight, rolling thunder rumbling through the nation's capital. >> i will say, no matter where i go, rolling thunder. look at all these bikers. do we love the bikers? yes. >> reporter: trump, who got five deferments during the vietnam war, paying tribute to those americans who served. >> we're going to take care of our veterans. we just raised almost $6 million for the vets. >> reporter: but trump's

appearance at an event honoring prisoners of war was a stark contrast with his famous comments about former p.o.w. senator, john mccain. >> he's not a war hero. he's a war hero because he was captured. i like people who weren't captured. >> reporter: those words still not sitting well with decorated veteran bob dole, the only former republican nominee to endorse trump. >> i am going to try to get trump to issue an apology. >> reporter: but many in the veteran community here say they give trump a pass. what they like most about trump is that he speaks his mind. >> i like the fact that mr. trump speaks the truth. >> reporter: trump now calls mccain a good man, but in an interview earlier this month said he has no regrets about his original comments. >> i like john mccain, and he is a hero. there are many people that like what i said. after i said that, my poll numbers went up seven points. >> reporter: tonight, here

press conference on tuesday to finally reveal the veterans groups who will receive money from that fundraiser he held back in january. tom? now to a civil war cemetery looted by thieves. here's karen travers. >> reporter: tonight, this sacred ground a crime scene after a brazen looting. the civil war battlefield in virginia, often used to honor the sacrifice made by the soldiers who died there, now desecrated. >> we had a report of finding a number of holes in the battlefield. >> reporter: investigators saying thieves likely used metal detectors and shovels to dig up civil war relics in the dark of night. >> belt buckles, buttons, possibly guns, ammunition. >> reporter: visitors paying their respects this memorial day weekend were shocked. >> i was very upset and heartbroken. >> reporter: the national park service telling abc news money is the big motivator. on ebay we found these civil war

relics for sale, said to be recovered in central virginia. and these rubber overshoes found at gettysburg. but for some, the theft at petersburg is personal. >> they don't want to see items that belong to their ancestors stolen. and it's just disrespectful. >> reporter: it's a federal crime to steal from parks like petersburg. violators can face up to a $20,000 fine and two years in prison. tom? >> thank you. overseas tonight, to the fight against isis. iraqi forces completing their buildup around fallujah. martha raddatz with an exclusive look at the war being waged from the skies. >> reporter: coming in for a landing at an air base on the arabian peninsula, the famed u-2 spy plane. we are in the che

alongside at close to 100 miles per hour, the driver talking the pilot down safely, since he has limited visibility in this aircraft when landing. returning from a 12-hour mission 70,000 feet above the war against isis. so high that pilots must wear pressure suits similar to astronauts. >> flying the u-2 is crazy, because you're the highest person in the world besides the people that are on the space station. >> reporter: you have the best surveillance possible, right? >> exactly. >> reporter: we are allowed on a mission in an awac over iraq and syria. those huge airborne radar systems coordinating the war planes. we've been orbiting over iraq for about two and a half hours now, very near the syrian border. when you're on station, that's the busiest time. you're looking out for aircraft, looking out for enemy? you pass on whatever? >> fun

the ground commanders so that they can decide the flow of battle. >> reporter: and once the targets are located, the drones, and fighter jets are unleashed. >> targets range from anything from banks to oil infrastructure to enemies on the ground. >> reporter: with the iraqis now trying free fallujah, those airstrikes will almost certainly intensify. martha raddatz, abc news, the arabian peninsula. now to the 100th running of the indy 500. lindsay czarniak is in indianapolis tonight. >> a rookie driver won the indianapolis 500. that's so rare. hasn't happened in 15 years. >> the winner, alexander rossi. >> reporter: he came out of nowhere. a year ago, he was a part-time driver in a different racing series in

he made himself a household name in front of a record crowd of 350,000. montoya, losing control. he was okay, but he was done for the day. rossi took a massive gamble. he managed to have enough to coast across the finish line on fumes. he has only been driving indy cars for three months. now, he's won the indianapolis 500. tom? >> thank you. still ahead on "world news tonight," driven to distraction. he should be watching the road, but appears to be watching something else. and later, how one daredevil got the most breathtaking view of one of the seven

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welcome back. next tonight, new video of a distract eed bus driver, tempti fate and putting passengers' lives in danger. here's lauren lyster. >> reporter: tonight, caught in the act. this bus driver appearing to alternate between watching the road and glancing at a video on his smartphone, around a dozen times in under two minutes. all while driving passengers down a busy interstate from the washington, d.c., area to new york city. this video, taken by a nervous rider, is far from the first. just this week, a student in illinois catching a high school bus driver allegedly texting. >> why would you be texting with students on the bus? it's just not right. >> reporter: a furious passenger last summer filming this limo bus driver texting on a new york highway. >> i couldn't believe that a man who had 45 lives in his hands would do something this serious. >> reporter: and here, another school bus driver caught talking on his c

>> we know from last year it costs some lives. i don't want my daughter to be one of them. >> reporter: the concern is warranted. close to 3,200 people died in distracted driving accidents in 2014, another 431,000 injured. despite those dangers, researchers say the number of people using mobile devices behind the wheel hasn't declined over the last six years. in the latest case, the passengers on that bus from the d.c. area made it safely to new york. as for the diver -- driver, he's been fired. tom? >> thank you. a star soccer player kidnapped. where he was last seen. and lightning strikes an area full of children. the latest on their condition, next. ared krill oil. unlike fish oil, megared is easily absorbed

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armed men after leaving a party near his hometown in mexico. no word yet on a possible motive. a lightning strike during a birthday party near paris. and the world's wingsuit wonder is at it again. jeb corliss, suited up here, and soaring over the great wall of china. a stunt he's been planning for ten years. gliding over the wall at 120 miles per hour, even hitting an apple-sized target along the way before parachuting to a safe landing. when we come back on this memorial day, abc news heads to vietnam. a story of how a group of navy s.e.a.l.s never forgot their translator. how it turned into the mission of their lives. stay with us.

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finally on this memorial day weekend, as we honor those that served our nation, a story from vietnam. tonight, how navy s.e.a.l.s returned the favor. here's bob woodruff. >> reporter: walking down this path in vietnam is like walking back in time, meeting nguyen hoang minh. he was the combat interpreter for every navy s.e.a.l. in the mekong delta during the war. >> those s.e.a.l. teams were the most effective combat s.e.a.l.

teams in vietnam primarily because of minh's influence. >> reporter: this lighter, a gift from a s.e.a.l. whose life minh saved. when the u.s. left vietnam, minh disappeared, presumed dead. but he wasn't. minh spent more than two years in a prison camp, then lived in poverty until patrol boat officer john donovan found him ten years ago. he recognized him by his smile. >> because he always had this big grin on his face. >> reporter: what would your life be like if the s.e.a.ls did not find you? >> i would be dead. for a long time. >> reporter: they brought him to florida for a reunion. >> you're a hell of a man, i'll tell you. god bless you. >> reporter: and now, they give him $300 a month, meaning minh can send his granddaughter to college. on this memorial day, as we honor our fallen veterans, these s.e.a.ls remember a man who helped them survive. bob woodruff, abc news, my tho, vietnam. >> we thank min and all of our

i'm tom llamas in new york. have a great evening. good night.

mr. trump: illegal immigrants are taken much better care of in this country then our veterans. anchor: and ahead on abc news, donald trump creating controversy at today's rolling thunder event. what he said that now has some military brass angry. and we will show you many of the sights and sounds of the annual event, which pays tribute to the fallen servicemembers. this?remember a little boy grabbed by a guerrilla at the zoo. -- drama was grabbed up grabbed by a gori