Hes the guy that is shaking it up. Sanders vowing to fight on even as his rival is setting her sights on donald trump. All of the major polls have me beating donald trump. Debris washed up in mozambique likely from the malaysia airlines. Aubrey mcclendon was killed in a fiery crash after big rig charges. Gunmen got away with 50 weapons. You have that many people now distributing firearms. Scott kelly is back home in texas after nearly a year on the space station. Leaving the space station was bittersweet. A gunman tries to rob a store clerk in her georgia convenience store. All that. In times square, a police horse goes wild, bucking the officer and then taking off. It was weird. I was like where is the officer . They do all of that stuff. Thats when you know youre a big shot when you dont have to go to the mailbox. Jimmy, im a movie star. Dr. Ben carson issuing a statement saying he doesnt see a path forward. The good news, he says im ready to operate on your brain. Super tuesday primary raise and each won seven states. Across the states that donald trump won were shock, denial, anger, guilt, bargaining, depression, and alabama. Announcer this portion of cbs this morning sponsored by toyota. Lets go places welcome to cbs this morning. Gayle king is off and Soledad Obrien is with us. Former republican president ial nominee mitt romney is about to launch a vicious attack on donald trump. Excerpt from a speech romney will deliver in a few hours. Romney plans to say, quote, a person so untrustworthy and dishonest as Hillary Clinton must not become president. But a trump nomination enables her victory. Thats right. The speech also calls trump, quote, a phony, a fraud whose promises are as worthless as a degree from Trump University. And romney says, equity, he is playing the American Public for suckers. He gets a free ride to the white house and all we get is a lousy hat. Dean reynolds is at the university of of utah in Salt Lake City where romney is scheduled to speak. Reporter good morning. Mitt romney isnt going to endorse anyone and he is not announcing another run for the white house, but he is harshly attacking donald trump who, in turn, is calling it a desperate move. In his speech today, former president ial candidate mitt romney will call donald trump a mitt is tough. Hes smart. Hes sharp. Reporter its a big difference from four years ago when romney was delighted to win the backing of trump. There are some things that you just cant imagine happening in your life. This is one of them. Reporter but now a great gulf separates the two men who represent the defeated past and the uncertain future of the gop. This has been an amazing evening. Reporter romneys Associates Say he has watched trumps assent with alarm and feels to shake sense into some people. Donald trump. Reporter Katie Packard runs trump pac after serving as romneys Campaign Manager. I think what he wants to do is be the adult in the room and sort of say, enough reporter todays speech comes amid open panic in the Party Establishment and wont mince words. One example donald trump says he admires Vladimir Putin while he has called george w. Bush a liar. Evil trumping good. So far, none of romneys attacks has worked, including a call to release trumps tax returns. Going to be a much bigger party and i think we are going to win in november. Reporter trump has soared in the polls and definitely soured on romney. This guy, what a terrible i endorsed him and about two weeks later, i said he is never going to win. Reporter now for good measure, donald trump has tweeted this morning, i am the only one who can beat Hillary Clinton. I am not a mitt romney who doesnt know how to win. Dean, thank you. The gop frontrunner will face three rivals tonight in a debate. Ben carsons campaign is over. He said on wednesday i do not see a political path forward. The retired neurosurgeon finished no better than fourth in all of the super tuesday primaries and caucuses. Theater in detroit, the site of tonights debate. Reporter good morning. Donald trumps republican opponents are ramping up efforts to possibly slow or stop his pursuit of the nomination. Marco rubio and ted cruz are expected to pound trump a second time at tonights prime time debate. Donald trump has never shown a commitment to the constitution. I have. Reporter in michigan, marco rubio touched on unprecedented angst over the donald trump jugger nationaljug er jugger naught. When youre the frontrunner people say get out of the race. What people are saying now is, please, everyone get together to keep the frontrunner from winning and destroying the Republican Party. We are going to make America Great again, folks. Reporter after trump won super tuesday states, they took the medal to the antitrump metal. Who has trump ever taken on . At Trump University reporter as another multiMillion Dollar antitrump fraud at his defunct Trump University. On capitol hill, the trump factor left republican senators at odds. I dont know what it is about it, but i cant seem to find anyone who supported him and yet here he is. People are not happy with status quo. This man is strong. He is decisive. Reporter perhaps signaling a shift toward the presumeptive nominee. Trump began to burnish his image a policies on health care reform. Far more specific than his onenote performance at the last gop debate. Trump took to facebook with photos. When youre dealing with congress we have to get them in a room and say, lets go. Its for the good of the people. Reporter 15 states have voted so far and amid record gop turnout, trurpmp won a third of all votes cast and more than his rivals. If we are going to beat donald trump the field cant remain fractured. Donald has, i believe, a hard cant get above. Reporter many members of the Republican NationalSecurity Community with ties to the george w. Bush administration released a letter yesterday criticizing trumps lack of Foreign Policy experience. Declaring he would make america less safe and if he becomes the nominee, they will not support him. Ahead, we will talk with one of the former officials who signed that letter. Hillary clinton held a starstudded fundraiser last night in new york city. Clinton is now turning her attention to november as Bernie Sanders tries to catch up. Nancy cordes is with us in studio 57. Reporter Hillary Clinton is leading in four big states that are voting later this month louisiana, michigan, ohio, and florida. As the Clinton Campaign helpfully pointed out yesterday she is leading sanders by a larger margin in the delegate count than president obama ever its a little bit finneyunny. Reporter at radio music city hall last night, Hillary Clinton mixed business with pleasure. We have a soldout crowd. Reporter raising tens of thusands from supporters. Youre going to hear me roe reporter and paid to hear katy perry and elton john, among others. This is a very important year for america and she is the only hope you have. Reporter there are still 35 primaries and caucuses to go. But as clinton pulls ahead in the delegate count, she and her backers are focusing increasingly on the general election. Labor will always have a seat at the table when im in the White House Reporter at a union rally in manhattan, andrew cuomo mocked the trumps talking about the wall. Frontrunner was on Bernie Sanders mind too. All of the major polls that have come out have me beating donald trump. Reporter sanders won four states on super tuesday and his aides say he has a shot at winning four more the next few weeks. Clinton aides argue that is not enough. In a memo, her Campaign Manager said that in order to catch up, senator sanders doesnt just have to start winning a few states, but he needs to start winning everywhere and by large margins. Sanders was singing a different tune. Colorado, we took on the establishment there. We won by 19 points. Reporter the Washington Post reports that the Justice Department has granted immunity to the former state Department Staffer who worked on clintons private email server when she was secretary of state. A sign this investigation may be moving forward. A piece of debris that could along to the missing malaysian jetliner is on its way to experts in australia. The chunk could help explain what happened to flight 370 when it vanished two years ago with 239 people on board. The debris was found off africa more than a thousand miles from the only confirmed piece of the boeing 777. Kris van cleave is in washington with the possible clue. Good morning. Reporter good morning. Mh370 is the only missing 777. The piece found over the weekend likely came from this section of the aircraft and now on its way to investigators. Sources say investigators are fairly confident that roughly threefoot long piece of metal shown in these pictures came from the missing mh370 and the airplane part with the words no step cameff the coast of mow zam beak over the weekend. Blaine alan gibson one of the men who found it spoke to cnn. I just knew when i found it that it was important to get it into the hands of the local authorities. Reporter u. S. Investigators have analyzed the pictures and believe they show a portion of the horizontal stabilizer, a winglike part of the tail section from a boeing 777. Australia is leading the deepwater search and recovery operation spanning 46,000 square mile area in the indian ocean but only one piece of mh370 has been found, a section of wing known as a flaper washed up on an island in july. Too early to speak on the original of the debris at this stage. Reporter they tweeted about it could belong to mh370 and days from the anniversary of its disappearance the latest clue is a reminder that one of the worlds greatest aviation mysteries remains unsolved. I dont think we are any closer and perhaps even more confused than when this thing actually went down almost two years ago. Reporter multiple reports this piece, is a wealthy traveler who has been searching for the aircraft, focusing on the indian ocean. He chartered a boat last weekend and found that piece of debris before turning it over to investigators. Thank you, kris. Three suspects in a brazen gun store robbery in texas are under arrest. Surveillance video captured the elaborate breakin at the houston store. The raid lasted about two minutes. Mark strassmann is at the crime scene as the police hunt other suspects. Reporter good morning. The front doors have been replaced but the crime scene tape is still up, because this is where the thieves bashed their way into the gun store and grabbed dozens of weapons on tuesday morning. Nothing subtle about this one. Its 4 30 in the morning and they rip out of the doors and ten scatter inside wearing grabbing as many guns and rifles as they could carry. It looks like they had something of a plan. You can see one suspect using a hammer to smash through the glass cases holding guns while others follow behind him and stuff them into bags. Another suspect seems to target the long guns off that rack behind the counter. They took at least 50 weapons and in a little more than two minutes, they were gone. Investigators say the group switched vehicles about a block away and took off into the darkness. This was such a rush job, Police Found Weapons left behind lying on the street outside the story. Law enforcement Officials Say stolen weapons like these are often sold on the black market. Criminals buying and selling guns to other criminals. You got another criminal element that needs firearms to commit their crimes, sometimes associated with the drug trade or robberies. Reporter investigators say theres another disturbing issue gun store smash and grabs are becoming more common. Only here in the houston, harris county, area, but uptick across the country. Reporter suspects will face federal gun charges. Investigators have recovered some of the weapons and hope to get their hands on the rest before they can be used in other crimes. Charlie . Mark, thanks. Police in oklahoma are investigating the death of a Legendary Energy titan. Aubrey mcclendon died yesterday in a fiery crash one day after being indicted. He made a fortune as a fracking pioneer but his business is under legal excrete knee. Anthony mason is here with questions about his death. Reporter on tuesday, the u. S. Government charged oil tycoon Aubrey Mcclendon for conspiracy. One day later, he died behind the wheel of his suv. The timing and circumstances have left some wondering if the crash might not have been an accident. Wednesday, Aubrey Mcclendons chevy tahoe crashed into the wall of an embankment and burst into flames. He had been traveling more than 50 miles an hour. He pretty much drove straight into the wall. There was plenty of opportunity for him to correct or get back on the roadway and that didnt occur. Reporter the accident occurred one day after the former ceo of Chesapeake Energy was indicted by the department of justice. He was charged with conspiring to rig bids for the purchase of oil and natural gas leases in northwest oklahoma. In a Statement Issued after the indictment, mcclendon denied any wrongdoing saying, i am proud of my track record in this industry, and i will fight to prove my innocence and to clear my name. Under mcclendons leadership, Chesapeake Energy made billions of dollars and transformed the Energy Business by pioneering hydraulic fracturing or fracking. Removing natural gas from rocks and described it as a gold mine in an interview with lesley stahl on 60 minutes in 2010. The last two years we have discovered the equivalent of two saudi arabias of oil in the form of natural gas in the United States. Not one, but two. Reporter the energy titan made his first billion during the energy boom. And became a partowner of his hometown nba team, the Oklahoma City thunder. But he was also dubbed americas most reckless billionaire by Forbes Magazine in 2011 for his lavish spending and aggressive risktaking. Just two years later, after Falling Energy prices sent his companys stock plum meting, he was forced out as ceo of chesapeake. Police say it could take up to two weeks to complete their investigation. But, at this point in time it looks pretty cut and dry as far as what exactly happened. Reporter mcclendon had been expected to turn himself in and appear before a judge at the Oklahoma City federal courthouse yesterday. Years in prison and a Million Dollar fine. Soledad . Anthony, thank you. Astronaut scott kelly arrived back in the United States overnight after his record segment 340 days in space. His twin brother mark was among those who welcomed him home in houston. The Vice President s wife jill biden was also there. She brought him beer and apple pie scott kelly spoke about the future of space exploration. This mission is the latest achievement in our countrys space program. But its not the last. There will be more. Its in our dna, of our country to explore and we must never stop. Scientists will study the impact of the mission on kellys body. The lack of gravity reportedly caused him to grow two inches that is fascinating yeah. Pressure on the spine. No question. Just an incredible achievement. Amazing. You realize how much he missed beer and apple pie. Interesting combo. Fast food chains are way ontario bicycles in livestock can create super bugs. That is ahead. First, its time to check your local weather. Announcer this portion of cbs this morning sponsored by do great things will donald trump feud with a moderator and overshadow tonights Republican Debate . The frontrunner faces fox news anchor megyn kelly for the First Time Since the pairs public clash. The news is back this morning right here on cbs this announcer this portion of cbs this morning folks, you cant make this stuff up. Four bandits chose a prius as their getaway car. Bravoniner, in pursuit of a toyota prius. Over. How hard is it to catch a prius . Over. Very funny. Oh look, a farmers market. We should get some flowers for the car. Yeah holly toyota. Lets go places. Bleeding gums . You may think its a result of brushing too hard. Its not. 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