We begin this morning with a look at todays eye opener. Your world in 90 seconds. People are shooting on one side and bombs went off as more shootings and other bombs but not really sure. A deadly terrorist attack strikes turkey. Three sued bombers open up fire before blowing themselves up. Police say Islamic State is behind the behind. Cries workiews working to re debris. Many, many people are wondering how this could happen. Europe leaders are arriving for the second day of their summit in brussels will one leader will be noticeably absent. A final report for the 2013 terror attacks in benghazi revealed no wrongdoing by secretary clinton. I think its pretty clear its time to move on. Hillary clinton said this is the Gold Standard. The partnership is a continuing rape of our country. A storm in denver delayed flights, flooded streets and sent ground crews scrambling at coors field. Unbelievable. Three people still missing from a headon train collision in texas. The three crewmembers are presumed dead. All that. Dramatic video of a police chase in houston. A hospital crew member decides to jump into action and tackle the suspect. Upton going back. To the ball. No, he catches it and the throw to the plate i ask you to read the report for yourself and draw your own conclusions. No, trey gowdy we didnt spend two years of spending taxpayer money for me to think on cbs this morning. None of us will not live forever. The best is the legacy left behind and for that, pat summitt qualifies. It was difficult but i felt a lot of strength from her and from here on out, im playing for her. I know coach would be so proud of you. Thank you so much announcer this portion of cbs this morning sponsored by toyota. Lets go places welcome to cbs this morning. Turkey says isis appears to be responsible for the deadly terror attack that rocked istanbuls main airport. A u. S. Intelligence source tells cbs news the coordinated attack took about 90 seconds. Disturbing video shows one of the attackers on the floor inside a turmoil after apparently being shot by security officers. Moments later, he blew himself up. Three suicide bombers killed at least 41 people in tuesdays attack. They had grenades, suicide vests, and automatic weapons. The violence wounded 239 others. One american was slightly injured. Holly williams is inside istanbuls ataturk airport with new details of the massacre. Holly, good morning. Reporter good morning. An air force official here today told us the three suicide bombers detonated themselves in different parts of the airport. You can see damage from one of the blasts just behind me. The turkish Prime MinisterBinali Yildirim said this is a look at terrorism and they lean in that direction but, so far, no claim of responsibility. This Security Camera video appears to show bystanders sprinting for cover just moments before an explosion tore through the airport. These shaky images seem to capture one of the armed gunman being shot and then riding on the ground before also blowing himself up. The sound of another explosion rocked those waiting outside the terminal building. The aftermath was a scene of horror. In one of the worlds busiest airports, with lifeless bodies literaturing the ground and emergency workers searching for survivors amidst the destruction. Many people who witnessed the attack looked to be in shock, like adam keally, a tourist from boston. Bombs went off and people were running the other way. More shooting. We came out and after that, i think there was another bomb. Reporter this is the latest in a space of deadly suicide bombings in turkey over the last year. The turkish authorities have blamed isis for some of them. Including two that targeted foreign tourists. But unlike similar attacks in europe, isis has never claimed responsibility. Other bombings were carried out by kurdish separatists. Members of an ethnic minority locked in a struggle with the turkish state. People waited for news this morning, their loved ones were caught up in an act of terror in a country that used to be an island of stability to middle east. But is now descending deeper into chaos and violence. This attack has saddened people in turkey but given the deteriorating security situation, very few here will be shocked. Gayle . Thank you, Holly Williams reporting from inside the airport in istanbul. The white house condemned the attack in turkey calling it heino heinous. President obama travels to ottawa with a meeting with leaders. Security is one of the key items on the agenda today. Margaret brennan, good morning. Reporter good morning. Well, throughout the night, president obama we are told has received updates on this latest attack in turkey which is a key u. S. Ally and we do expect here in ottawa for the president to make remarks shortly after he touches down. Now, the u. S. Does agree with the turkish Prime Minister this has the signature of an isis attack but waiting on further intelligence. U. S. Intelligence today indicated an attack on foreign tourists, particularly americans, was eminent. That led the state department to reissue a public warning and order the families of american officials to stay out of certain parts of the country. So far, this morning, it does not look like american citizens are among the casualties. For president obama, though, it is the third time in the past year a major summit is being overshadow by terrorism. Here in ottawa, mexico, canada, and president obama representing the u. S. , were all supposed to sit down and tackle tough Climate Change issues, including a pledge to switch to Renewable Clean Energy and tackle immigration issues. Of course, all of the talk of the 2016 campaign and building walls, cutting off some of that passage with mexico has been very controversial. But, right now, securities issues is at the top of the agenda as well because this attack in turkey could be a gamechanger. Turkey is a u. S. Ally within nato. That means they can compel the u. S. And europe to take action. So this sets the stage for some intense talks next week, when president obama sits down with turkish leaders and other members of that nato military alliance. Thank you, Margaret Brennan in ottawa, canada. Fran townsend is a former security adviser for president george w. Bush. Who, why, what next are the questions. We are hearing that turkish and intelligence affiliates in the United States are saying isis. For a lot of reasons it make sense a civilian target. On the other hand, in december of last year, an attack at a small youre turkish airport and it was by a turkish separatist group. I think we need to know more information about the three suicide bombers were and what their relationships were and to understand and get a better sense why officials are pointing right away to isis. What does it say about what isis wants to do . Fallujah has been recaptured by iraqi forces now. You have a deal now between israeli and turkey getting back together in terms of their relationship now. Does this suggest that they are striking out new ways that they cant win on the battlefield . That is exactly that was the point. John brennan testified before congress and made that very suggestion. Yes. And so its kind of hard to imagine that they did it that quickly based on the outreach to israeli to russia. A lot of bad guys in turkey and that order has been very poorest. Its interesting because you see sort of 2 to 3 million refuges there area was isis able to get a cell there and sleeper cells . Exactly right. Secretary kerry said authorities have to get this right 24 7, 365 days a year and terrorists have to get it right ten minutes. Does it seem we need to do more that we are not doing. Turk irofficials at the airport acted incredibly quickly. You showed the video earlier. They shot one of the guys before he was able to detonate himself. He was still able to do that but have to give real credit to the response of Turkish Police. One of the things we do in this country in the prescreening area, that is before you go through that initial screening, is we have Security Officials watching, who are trained on behavioral analysis, to look for people and to try and sort of identify them. We have that here in the United States . We do. We need more of them but we do understand there is a particular vulnerability to passengers while they are waiting to be screened. Fran townsend, thank you. In a statement after the airport bombings Hillary Clinton said todays attack in istanbul only strengthens us. Unfair trade donald trump said trade has damaged the United States and would use his power as president to renegotiate treaties, reduce trade deficits and bring jobs back home. Major garrett is following the trump campaign. Major, good morning to you. Reporter good morning. On the heels of britains exit from the European Union, remember, that is a referendum where elites were stunned by the votes of those anxious about global economics. Donald trump admitted he used to bankroll free trade politicians. Now trump calls himself a populist economic warrior as he runs to Hillary Clintons left on trade. I want you to imagine how much better our future can be if we declare independence from the elites. Reporter donald trump hit the swing states of pennsylvania and ohio. I was on the right side of that issue, as you know. Reporter hoping to capitalize on britains recent vote to leave the European Union. Our friend in britain recently voted to take back control of their economy, politics, and borders. Reporter trump blamed the decades long loss of manufacturing jobs on the north American Free trade agreement or nafth and supported by republicans and bill clinton. The havoc that it wreaked after he left office was unbelievable. Reporter president clintons patch of nafta trump argued accelerated job losses and he says the pending asian Transatlantic Partnership would do the same. The Transpacific Partnership is another disaster. Done and pushed by special interests who want to rape our country just to continuing rape of our country. Reporter trump vowed to withdraw the u. S. From the tpp and renegotiaafta and slap coun with current trade deals. Hillary clinton said not long ago said this is the Gold Standard of trade pacs. Reporter Hillary Clinton trumped that its manufactured. His promises economically hallow. Dont look for easy answers and misleading promises that cannot deliver what youre hoping for. Reporter a new national poll, we can never have too many, shows the two tied with clinton at 42 and trump at 40 . Both viewed negative by 57 of those surveyed and the majority say both would be bad president s. Thanks, major. Leaders of European Union countries are holding day two of an emergency summit in brussels and discussing what happens when britain leaves the eu. Britains leader was told not to attend the second day. Charlie dagata is in london where the heated debate continues. Charlie, good morning. Reporter good morning. Prime minister David Cameron staked his career on staying in the eu. Not only his he sent packing frm brussels and facing the music in parliament why the uk discusses the future without the uk. For the first time in more than 40 years, britain is on the other team. Even the president of tiny eu member lithuania made that clear. Today is about us. What we are going to do about our unity. Reporter before he was sent home, Prime MinisterDavid Cameron did what he could to salvage what is left of a messy breakup. While britain is leaving the European Union, it will not and should not, in my view, it wont turn its back on europe. Reporter german chancellor Angela Merkel said if britain is going, the sooner the better and it shouldnt be allowed to cherrypick the parts of the eu membership it liked. Dutch Prime Minister offered a more backhand support saying, yes, the United Kingdom had collapsed, politically and monetarily and constitutionally and economically and for those reasons out of the question for britain to act right away. Alone and isolated the uk is under an internal breakup too. Nicholas stuo sturgeon is in eu. Scotland reminded to remain in the eu and something allen smith reiterated in a rousing speech. Scotland did not let you down. Please. I beg you. Do not let scotland start now. Reporter the Sticking Point to britains exit now are a lot like they were before the vote. Access to the free market and eu reforms on the freedom of movement. Charlie dagata in london, thank you. The last investigation is finished for one of two major controversies surrounding Hillary Clintons president ial campaign. A House Committee found no significant new evidence about clintons role in responding to the benghazi, libya, attack that killed four americans but the fbi is still investigating her use of a private email server. Nancy cordes is on capitol hill where the benghazi report was released yesterday. Good morning, nancy. Reporter good morning. The republicans who led the Benghazi Committee issued two reports. The main report, which doesnt really break new ground when it comes to secretary clinton, and the second led by a congressman who called her actions morally reprehensible. I think its pretty clear its time to move on. Reporter clinton, the state department and the white house had the same take on the Benghazi Committee on tuesday. It had to, today, report it had found nothing. The Committee Found something that we already knew. We dont see anything new there. Reporter but the committees seven republicans insisted they found plenty that was new. God knows nobody has ever reported who actually evacuated our folks. Reporter the 800page report revealed in the absence of any military aid in benghazi, embattled americans were rescued that night by a group of libyans who had close ties to the gadhafi regime. Think about that for a second. The worlds most powerful military did not meet a single solitary selfimposed time line. Reporter the Clinton Campaign argued the committee came down hard on the militarys response because republicans couldnt come up with the goods on her. Trey gowdy, a former prosecutor, took pain tuesday to appear impartial. Youre the expert. What do you think . Do you think she lied . That is a word you couldnt use in a courtroom. Reporter two Committee Republicans were more critical suggesting that clinton kept the benghazi consulate open despite irritating security because she pushed for the United States to intervene in libya in the first place. Libya was supposed to be the crowning jewel of the Clinton State DepartmentForeign Policy and the Obama AdministrationForeign Policy. This was their example of how it works. Reporter the sister of ambassador Chris Stevens who lost his life says she does not blame Hillary Clinton or anyone else in the administration for her brothers death. In a rare interview with the new yorker, dr. Anne stevens says the administration was trying to spread security at u. S. Embassies around the world. Charlie . Nancy, thanks. Video kaurptscaptured the m two freight trains had a headon collision. Three crewmembers are missing. They are trying to find out why the trains were on the same track. A fourth crewmember jumped clear and avoided the crash. That could prove crucial to the investigation. Denver is drying out this morning after a fast moving storm. I have never seen this much standing water on the field. Unbelievable. Unbelievable is the word. Heavy rain flood coors field and delayed a baseball game between the Colorado Rockies and the toronto blue jays. Hail pounded the field as the water poured into the dugout. Some workers inside found themselves swamped. Rain flooded the street throughout denver. The storms dumped more than half the citys average monthly rainfall in one night. Does the key ingredient in one of the most popular weedkillers on the market cause cancer . I want to make people aware of what it is they are spraying. I dont want them to go through what i had to go through. What your family had to go through . Uhhuh. And what im still going through. Ahead, one mother shares her Health Battle in ahead, we will bring you the very latest on the deadly bombings in turkey and the hunt of those behind the attacks. Why a former tsa Officials Says its nearly impossible to prevent an attack of airports in this country. The news is back in the morning right here on cbs this morning. vo stank face. A universal expression of disgust, often caused by inadequate cat litter. If you or your a loved one suffers from stank face, the cure is tidy cats. Its new and improved with guaranteed tidylock protection that locks away odors. So you dont have to face one more stank face. Tidy cats. Every home, every cat. Theres a tidy cats for that. Wearing powerful sunscreen . Yes neutrogena® ultra sheer. Unbeatable protection helps prevent early skin aging and skin cancer with a clean feel. The best for your skin. Ultra sheer®. 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