Who is best fit in an uncertain time . A nation on edge. A special edition of world news tonight begins now. Good evening from cleveland, where the Republican Convention will begin tomorrow. But this evening, this country finds itself once again mourning the loss of Police Officers shot and killed. First dallas, now baton rouge. Three officers killed today. After five were killed in dallas. This time, there was a 911 call reporting someone with a gun. Six officers shot before the gunman was taken down and killed. Tonight, authorities in louisiana making it clear, they do not believe there are other gunmen are on the loose. But they are investigating whether or not anyone else knew about this. And president obama saying, make no mistake, justice will be done. Heres eva pilgrim. Leading us off from louisiana tonight. Reporter tonight, baton rouge reeling after a man opened fire at a gas station. A lady came up and said there was a subject walking with a coat and an Assault Rifle out here behind the store. Reporter just after 8 30 this morning, reports of a man dressed in all black with a rifle just a mile from state police headquarters. Brady vancel was on his way to work. When i looked over to the right there was a man running in my direction away from the body with an Assault Rifle in his hand. As soon as we got eye contact at one another, he stopped in his tracks and turned around and started sprinting the other way. Reporter police cars speeding to the scene, s. W. A. T. Teams moving in. Shots fired officer down shots fired officer down ive got a city officer down shots fired i dont know where the subjects shooting from reporter the horror, captured on camera from this car, outside the convenience store. Bullets flying as the suspect draws police into a gun battle. Police scanner traffic, capturing the chaos as officers are shot. Ive got two down back here, two down deputy down, deputy down reporter then, officers locate and kill the suspected gunman. Weve got eyes on him. Hes behind that transformer, appears to be on the phone. At this point it appears the scene is secure. Were going to have a robot come and check him out. Reporter at first, Law Enforcement not sure if the gunman acted alone, urging residents to stay indoors, choppers swirling overhead. There was a shooting. We believe there are multiple suspects. One suspect is deceased, multiple officers were shot. We do have some that have been killed. Thats what i know for sure right now. Reporter when its all over, three officers killed, three more injured, one of those in critical condition. Late today, authorities reassuring residents. We do not believe or do we have any other shooter held up in any other area in the baton rouge area. Reporter tonight officials in baton rouge asking for prayers. Until we come together as a nation, as a people, to heal as a people if we dont do that and this madness continues, we will surely perish as a people. And eva is with us live tonight. Initially, they were concerned there could be more than one shooter, but they do believe he was a lone gunman . Reporter thats right. Police say they shot and killed the lone gunman on the scene, and say it is no longer an active shooter situation. David . Eva, thank you. And of course, the question, who was this lone gunman, what do we know about his motive . We have just learned his identity tonight. Heres brian ross. Reporter federal Law Enforcement officials identified the shooter as 29yearold gavin eugene long, an africanamerican from kansas city. Officers engaged the subject, and he ultimately died at the scene. Reporter police say it appeared to be a wellplanned ambush. He had a mask on. One subject. All black. Carrying a. R. Reporter one shooter tracked and killed at this convenience store. Right there. Stop, stop. To your left. To your left. Right there. We got eyes on him. Hes behind that transformer. Appears to be on the phone. Reporter in the wake of the Police Shooting of alton sterling in baton rouge, and then the deadly attack on police in dallas by a man who wanted to kill everything blue that moves, Law Enforcement in baton rouge had been put on alert last week by the fbi and Homeland Security for a possible attack. These threats are very viable and theyre very real. Reporter this fbi bulletin from its new orleans office, obtained by abc news, showed images from social media and warned, multiple groups are calling for or planning riots and or violence against Law Enforcement in baton rouge, louisiana, and shreveport, louisiana. Ive been involved in Law Enforcement for over 30 years. I have never seen an environment this dangerous and this polarized as it relates to police in this country. And brian ross is with us here tonight. Looking at both cases in dallas and baton rouge, it would appear both gunmen had military backgrounds. Thats right. This is a former marine, discharged in 2010. Today was his 29th birthday, david. Thank you, brian. Tonight, this Convention Center surrounded by fences, nearby roads are closed. Thousands of officers are here, prepared for any threat. Pierre thomas, on whats being done with just hours to go until the Republican Convention. Reporter against the backdrop of todays horror in baton rouge, cleveland is deploying an army and building a fortress to protect the Republican Convention. Its not lost on Law Enforcement officers that they have a target on their backs. Just ten days ago, the ambush in dallas. Protesters running as snipers take aim at officers. Five officers losing their lives. Police officers that did not return home from work. Reporter it was just three days ago that president obama sat down for a National Town hall meeting on policing and race. We have to have police that are respected, and we have to recognize the fear their families go through every time they walk out that door. Reporter tonight, Law Enforcement sources tell abc news theyre facing perhaps the most volatile and complicated security picture in recent memory. Those dump trucks are there to stop cars, trucks, or anything else from getting access to crowds. There are thousands of Police Officers in this city, including many on bikes, be flexible to to get anywhere quickly. And there are cameras throughout the city to give complete situational awareness. All of this taking place in ohio, an open carry state. Where citizens are allowed to carry guns in public spaces without a permit. Theres a bushmaster predator. Reporter but even this Second Amendment advocate warned that people should not bring guns when the convention starts. I dont encourage anyone to come down here tomorrow carrying if you have no need to. Pierre, we know there was some confusion in dallas after the Police Shootings, because of the open carry law there. A push by some now to try to change it, at least temporarily, in ohio. Its not going to happen. The governor says he cant suspend the constitution on short notice. Pierre, thank you. And we should note, for the 17th time in office, president obama addressing a domestic mass shooting, calling anyone that targets Law Enforcement a coward. We need to be loud and clear, nothing justifies violence against Law Enforcement. I want to bring in jonathan karl, who is here in the convention hall. Hard to believe, we were just with the president in the National Town hall, and tonight, hes just addressed the nation yet again. Reporter over and over, hes had to address the nation. Following mass shootings. But theres something different. Both in terms of what is happening, and in the president s words. The fear is were looking at potentially a new trend. The intentional targeting and hunting of Police Officers. Thats why you heard real anger from the president. Talking about cowards who speak for no one. And my next question, a lot of eyes on donald trump and the tone tomorrow night, really on both president ial candidates, listening to their every word with the nation on edge. Reporter no question, these issues will be front and center as they take the stage. The republicans here in cleveland, and next week, democrats in philadelphia. But david, these are the two most divisive candidates weve seen in in memory, at exactly the time that voters say they want to be unified. In our poll, out just today, 83 say they expect the next president to put a major focus on improving race relations. They want unity, not division. Jon, thank you. Both donald trump and Hillary Clinton have responded to the shootings in baton rouge. As voters now study their every word. How well they would respond if elected president. Tom llamas tonight on what, if anything, changes now with the convention in cleveland beginning tomorrow. Reporter tonight from donald trump, this message we grieve for the officers killed in baton rouge today, were trying to fight isis, and our own people are killing police. And, we are trying to fight isis, and now our own people are killing our police. Our country is divided and out of control. The world is watching. Reporter this week the world will be watching trump. Its to be a wonderful day. Reporter kicking off his convention after the rocky rollout of his running mate. If you look at one of the big reasons that i chose mike, and one of the reasons is party unity, i have to be honest. Reporter trump speaking for nearly 30 minutes, mostly on other topics. Back to mike pence reporter but pence, ever the loyal soldier. Youre amazing. Reporter still, pence and trump have big differences. For one, pence has called negative campaigning wrong. Lyin ted. Little marco. Reporter on 60 minutes, pence was asked about trumps tone. What do you think about your running mates campaign and the tone and the negativity of it . I think this is a good man whos been talking about the issues the American People care about. But what about the negative side . He apologized for being a negative were different people. I understand that. Ill give you an example. Hillary clinton is a liar. I call her crooked hillary. Shes crooked hillary. He wont i i dont i didnt ask him to do it, but i dont think he should do it because its different for him. Reporter his mission now, selling the trump pence ticket as a solution to the turmoil in this country. We are the law and order candidates. And were the law and order party. Reporter Hillary Clintons team releasing this statement. Todays assault on Police Officers is an assault on all of us. Theres no justification for violence, for hate, for attacks on men and women that put their looi lives on the line every day in service of our communities. And tom llamas is live with us as well. Overlooking the stage there. Really a delicate balance when it comes to tone here. And the trump team is confident the tone will match the nation . Reporter right. The theme tomorrow is make america safe. They will be sensitive to the attacks in baton rouge, but they want to hammer the point that trump is the law and order candidate. Tomorrow, well hear from rudy giuliani, veterans from benghazi, and others. David . Tom llamas with us in cleveland. And we hope youll stay with abc news for Convention Coverage all week long. World news tonight, good morning america, and nightline, all live from cleveland, and a Network Special report every night in primetime, 10 00 p. M. Eastern. Ill be joining George Stephanopoulos and our Political Team here. Every night, gavel to gavel coverage on our live stream channel. In the meantime, overseas in turkey. After the attempted coup. Thousands of progovernment supporters are taking to the streets. And tonight, the United States is now caught in the middle. With turkey, demanding the u. S. Deport the turkish cleric in pennsylvania they claim helped fuel this. Alex marquardt from istanbul. Reporter with the rebellion crushed, tonight, the reckoning. President Recep Tayyip Erdogan tightening his already iron grip. More than 6,000 people now under arrest. Many of the rebel soldiers herded together, beaten by mobs, and loaded on to buses. New video tonight shows the first moments of the attempted coup. This clip from the president s office of a tank barreling through traffic. Turkeys government now with threatening words for the obama administration, demanding the extradition of the turkish cleric whose supporters they accuse of spearheading the coup. Also, flights cancelled, leaving Many Americans trying to get out. We were pretty well stuck. Reporter flights have resumed from the air base, but many are wondering if this purge and unrest will affect turkeys crucial role in going against the terror group. Alex. Thank you. And from nice, france, more arrests as we hear from an american recovering in a hospital there. Heres linzie janis. From france tonight. Reporter tonight, french investigators looking for accomplices, questioning seven people. Including a couple who they believe provided the nice attacker with the fake weapons found in his rented truck. Tonight, dozens still hospitalized, including this california dad. When that white truck barreled through the crowd thursday night, Greg Krentzman was on the boulevard with his wife and 9yearold daughter. The truck running over his foot. A stranger taking him to the hospital. Were there as he checks in with his daughter, also recovering tonight. After breaking her ankle in the chaos. I love you, and really proud of you. Reporter tonight he tells us hes desperate to thank the Good Samaritan that brought him to the hospital so he can thank him. David . Thank you. Still ahead, new developments in the urgent manhunt for the accused killer. Slipping out of handcuffs. Tonight, were learning about the alleged accomplices, sending signals to help him get away. The small plane crash. Just missing several homes. And the Severe Weather threat, flash floods and heavy downpours. The system moving east, and the dangerous heat on the way. There could be major storms in cleveland tomorrow during the convention. Rob marciano, standing by. Rob marciano, standing by. Sfx crowd cheering sfx crowd booing sfx crowd chanting sfx crowd cheering sc johnson, a Family Company try duo fusion ing antacids . New, two in one heartburn relief. The antacid goes to work in seconds. And the acid reducer lasts up to 12 hours in one chewable tablet. Try new duo fusion. From the makers of zantac. Hey marc, how you feelin . Dont ask. This is what it can be like to have shingles. A painful, blistering rash. I never thought this would happen to me. If you had chickenpox the shingles virus is already inside you. 1 in 3 people will get shingles in their lifetime. Im going to go back to the eye doctor tomorrow. Its pretty close to my eye. I dont know how you do it. Talk to your doctor or pharmacist today about a vaccine that can help prevent shingles. We turn next this sunday night to new developments in the manhunt for an escaped prisoner in florida. Police today revealing his courthouse escape was well planned. Heres Ron Claiborne on the alleged accomplices who were ready and waiting. Reporter it was daring. It was bold. And it was planned to a t. 22yearold Dayonte Resiles slipping out of his handcuffs, shedding his jail jumpsuit, and racing from the courthouse to a waiting car. He took off his clothing, last seen in the hallway. Reporter tonight, the accused murderer is still on the run, but four people who police say helped him to escape, nabbed. Four of his accomplices are under arrest. Reporter Police Say Two of them 17yearold twins went into the courtroom with a cell phone. On the other end of the line, resiles girlfriend laquay stern. And a friend, winston russell, outside in a getaway car with fresh clothing, including a police uniform. One or both of the twins coughed into the phone. They signaled when resiles jumped out of the jury box and fled the courtroom. Reporter resiles was whisked away, triggering a massive manhunt. Tonight Police Warning hes armed and dangerous. Ron claiborne, abc news, new york. Ron, thank you. When we come back, extreme storms at this hour were watching, and then the heat moving in. Some states in the triple digits. Rob marciano is here. And the small plane crashing, theres news tonight about the people onboard. About the people onboard. Thats life. You diet. You exercise. 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A close call in westwood, massachusetts. A small plane crashing, just missing some homes. The pilot and a passenger survived but with serious injuries. The plane was trying to land when it suddenly went down. The cause of the crash, under investigation tonight. Now to the weather, a flash flood emergency in raleigh, north carolina. Cars under water after the creek rose 15 feet within hours. And damaging storms in iowa, ripping the roof off of this home. Barns torn apart. Heres rob marciano, tracking it all. Starting with the southeast, where once again, the radar is from florida to south carolina. The dangerous stuff will be in Central Indiana or illinois. Clusters of thunderstorms and could be some damaging wind. Then tomorrow, cleveland, ohio, in the threat zone, as is western new york and in through northern new england. Damaging winds potentially there. And the heat, up over 100 across the heartland. Late in the week, going north and east. 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We have more now on the Police Shootings in baton rouge. Law enforcement officials have now converged on the kansas city, missouri, home of the suspected gunman, gavin long. At least three officers killed. The shooter taken down by police. Authorities say the attack appeared to be wellplanned. The shooter has been identified as 29yearold gavin long, a military vet. The fbi now warning Law Enforcement across the country of potential threats. Just a week after the deadly ambush in dallas that killed five officers. President obama condemning the shooting, saying attacks on Public Servants are the works of cowards. We do thank you for watching on a sunday. I da its time for Celebrity Family Feud get ready to drop it like its hot, because weve got the doggfather himself its snoop dogg and his family, playing for the snoop youth football league. [ cheers and applause ] but the other team wants to deliver a knockout punch. Its one of the greatest boxers of all time, Sugar Ray Leonard, and his family, playing for the Sugar Ray Leonard foundation. And now the star of our show steve harvey [ cheers and applause ] whats up, baby . Whats up, boy . Hey whats up, ray . How you feeling, man . Whats up . How are yall . Thank you very much