back kasich. and david wright starts us off tonight. >> it's just tear gas. >> reporter: forget occupy wall street, these days, it's more like occupy donald trump. >> get him out of here. get him out. send him back to bernie. send him back. >> reporter: the latest example, today in blom ingomington, illinois. >> troublemakers. they're disrunpruptdisruptors, not protesters. >> reporter: police used horses forrowd control, then pepper spray. i have a mouthful of pepper spray. trump blamed bernie sanders for the disruptions.

sanders supporters. but that's not to sayhat the sanders campaign sent them. tensions have been growing. in dayton, ohio, a lone protester rushed the podium, scaring trump and the secret service. and later, he claimed this guy is a supporter of isis. >> all i know is what's on the internet. >> reporter: while tmp says he doesn't condone violence, remember the guy that sucker-punched a guy in north carolina? trump says he's considering paying for his legal fees. >> if donald is the nominee, it

hillary clinton wins the general. >> reporter: and all quiet so far in florida. trump calls it his second home. hoping to snatch it away from marco rubub on tuesday. >> thanks. and let's go to jonathan karl. how does this affect the voting in the big states on tuesday? >> in the short run, i don't think it affects trump at all. his supporters are probably going to rally to his side, and a lot of people have already voted in those big states. in ohio, they've been voting since the middle of february. but in the long run, it could hurt trump, because he needs to unite republicans and eventually the entire country.

and hillary clinton, trying to wrap up the democratic nomination with a big win on tuesday. and the closest fight in illinois, 51-45. and mary bruce on the campaign trail. >> reporter: tonight, bernie sanders is crying foul. as donald trump blames sande supporters for the chaos at his rallies. >> tells the truth very, very rarely. and i'm afraid he's lying again. >> reporter: and he's pointing the finger back to trump.p. donald trump is now threatening to send his supporters to bernie sanders' rallies in an act of retaliation. a handful showed up in st. louis. anddn columbus, a different take.

>> feel the bern. >> reporter: as they battle it out in five states on tuesday. and hillary clinton made her final pitch, taking a jab at sanders. >> it's not enough if you want be president, to tell people what you're against. >> reporter: saturday night live poked fun at the challenges she faces from sanders. >> i'm sick and tired of hearing about my own damn e-mails! >> and i've got supporters of all ages, 18-year-olds, 19-year-olds. >> reporter:nd bernie sanders has been spending a lot of time in ohio, where he says he feels the momentum heading into tuesday. but accccding to the polls, hillary clinton still holds the lead. toto >> thank you. and stay with abc news for primary results t toughout the night on tuesday. we want to move on to

georges county,, maryland. an officer, shot outside of a place station. and our affiliate reporting one suspect taken into custod and we're following breaking news overseas. two separate terrorist attacks. turkey, a huge explosion, the blast reportedly f om a car bomb in the capital. and in west africa, al qaeda claiming responsibility for a deadly assault. alex marquardt with the new aim images coming in. >> reporter: a bloody sunday on two continents.

area next to a bus stop and government buildings. the dead and wounded carried away. more than 30 killed. the u.s. state department had warned of a potential attack. the fourth to hit turkey in six months, blamed on the kurds and isis. and coming after news that terrorists had stormed a beach in the ivory coast. security fces quickly surrounded the area. and the government said 16 people were killed, in addition to 6 attackers, believed to be from the al qaeda affiliate in afternoon africa, after they claimed responsibility.

terror attacks is growing. intelligence officials say the question is not if, but when about the next terrorist attack. and 5 million people facing a severe weather threat that could include tornadoes. nearly 5,000 homes damaged in louisiana. phillip mena in the flood zone tonight. >> reporter: communities across the south working to hold back the swollen rivers. in this louisiana neighborhood, families who were rescued by boat this weekend returning home to see the damage. we were with the engelhart family yesterday. >> it didn't matter that my house was destroyed as long as my family was safe. >> reporter: their home was spared. but this house was damaged by

>> we knew it was over. we knew it was coming in the house. >> reporter: roadways under water. debris, floating among the submerged homes. and tonight, a new worry -- dangerous mold. the baseboards and saturated drywall coming out. >> we have bad allergies, so getting the mold is our biggest concern. we want to get it taken care of. >> reporter: obviously, the skies have cleared up here. but just north of here, severe weather is on the move. many bracing for dangerous storms tonight. tom? >> phillip, thank you. let's go to indra petersons. >> you can see tornado watches out there for eastern portions

looking for fast-moving cells, that could take people off-guard overnight. and it's not the only place gettinhit hard. in the pacific northwest, series of storms moving through. and 30,000 people in seattle without power. and they do need the snow in the sierras sierras, so hopefully putting a dent in the drought situations. and moving on to zika, 193 cases in states. eva pilgrim with the radical new way to fight zika. >> reporter: tonight, a potential new weapon in the

using mosquitoes to help stop its spread. scientists releasing genetically modified mosquitoes. and in brazil, scientists are already u3ing these mosquitoes. dr. richard besser saw them firsthand in february. >> this produces 2 million male mosquitoes genetically modified every week. >> reporter: and the cdc w wning that zika could spread in the united states by june. and while the experiment has proven successful in brazil, not everyone is pleased. >> when you open this pandora box, there's no saying it will

>> reporter: and t ty're taking comments before the final decision is made on the field test. tom? >> thank you. and a record number of travelers as spring break approaches. but right now, some wait times at airportsreaching two hours. here's gloria riviera with what you need to know. >> reporter: tonight, across america, airport security lines at baking point. caused by tsa shortages, and a record number of spring break travelers. >> missed my flight. >> reporter: the tsa normally screens 2 million passengers every day. but that skyrockets during sfring spring break. they're projecting 140 million passengers will fly on u.s. airlines.

people lining up every day in the security line. and the tsa turning outore than 200 new employees every day. but some tips, chekk delay tommy times. >> fly on a saturday or sunday moing. >> reporter: and use social media. tweet the airline, and most have rapid response helpers to help solve your problem. and a device that causes cell p pne calls to drop. and later, the dog that beat cutting edge technology. how he saved his little y detecting that trouble was on the way.

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welcome back. a train full of commuters talking on their phones, when suddenly they're dropped. a fed-up commuter accused of taking it into his own hands. >> reporter: millions of commuters have been there. looking for peacend quiet, only to be interrupted by cell phone calls. and police say this man allegedly used this device to block phone calls. tonight, he's facing a charge of interfering with a public utility utility. >> he's been a good member of

malicious intent to hurt anybody. >> reporter: the devices jam the signal. using them is against the law. >> this gadget is illegal to use. i'm not using it, just reviewing it. >> reporter: still, they're easy to find online. this man, suspended for using a jammer to get his students to put phones down. thisriest installing a jammer in church to keep his mass quiet. the lawyer for the man in chicago has yet to f)le a plea. tom, cell phone jammers can srupt police communications and emergency calls. new concerns over a popular electric car.

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welcome back. our "index" tonight, starting with a frightening accident at a shooting range in florida. six shot, including children, by one bullet. investigators say a man was loading a shotgun when he accidentally fired it. and it ricocheted, injuring them. none of the injuries life-threatening. and nissan is recalling some of its leaf electric cars. they need their computer systems reprogrammed. and a fisherman, reeling in a great white shark.

submarine with a tail on it. and the story of luke and a dog named jedi. how he saved his owner's life late one night.

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even if you have already been vaccinated with another pneumonia vaccine, prevnar 13 may help provide additional protection. prevnar 13 is used in adults 50 and older to help prevent infections from 13 strains of the bacteria that cause pneumococcal pneumonia. you should not receive prevnar 13 if you have had a severe allergic reaction to the vaccine or its ingredients. if you have a weakened imimne system, you may have a lower response to the vaccine. cocoon side effects were pain, redness or swelling at the injection site, limited arm momoment, fatigue, headache, muscle or joint pain, less appetite, chills, or rash. get this one done. ask your doctor or pharmacist about prevnar 13 today. finally tonight, an incredible story of natutu beating technology. aa black lab named jedi, devoted to his master luke.

>> reporter: jedi has an acute sense of smell, but it's his sense oftiming, spreading this picture over facebook. luke is 7, diagnosed with a chronic condition. the doctor says, your son as diabetes, he needs to go to the hospital now. >> reporter: the other night, the whole fily was asleep, luke's blood sugar dropped, and jedi sounded the alarm. jedi has been trained to smell when luke's levels go too slow. >> he's really special to me, because he always knows, his nose can sniff where i am. >> he laid on me.

i have to get up and check luke. i think there's an issue. >> reporter: sure enough, luke was able to get his shot. good timing, good training, and also friendship for real. >> he's my first, best friend. >> reporter: john donvan, abc news, washington. >> we tnk you for watching. "gma" first thing in the morning, david muir will be back

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