Mccarthy stunned his republican colleagues today by dropping out of the race for speaker of the house on the very day that he was expected to be nominated for one of the most powerful positions in the nation. Nancy cordes now on whats behind mccarthys decision and the scramble for a replacement. Reporter chaos was the word House Republicans used to describe their own Conference Today after mccarthys mccarthys surprise announcement. We were all in shock. All members of the delegation, of the conference were shocked. Reporter they had gone into the closed door meeting to elect their next speaker when the frontrunner told them he was pulling out. I think i shocked some of you. Reporter mccarthy, who is currently second in command, said he sensed the party was too divided over his bid. For us to unite, we probably need a fresh face. Reporter he had been weakened in part by his own words, an apparent admission last week that the house benghazi investigation actually had a political aim. Everybody thought Hillary Clinton was unbeatable, right . But we put together a Benghazi Special committee, a select committee. What are her numbers today . Reporter the comment handed clinton a powerful talking point. Look at the situation they chose to exploit to go after me for political reasons, the death of four americans in benghazi. Reporter then last night, roughly 40 hardline conservatives who call themselves the House Freedom caucus endorsed florida congressman Daniel Webster for speaker, a sign they might buck mccarthys leadership as they had speaker john boehners. That dynamic has made the job distinctly unappealing. Utah a Jason Chaffetz is one of just two people who say they want it. I think we have a lot of internal fracture, fracturing thats happened, and we need to figure out a way to unite the party. Reporter several party elders are trying to convince wisconsins paul ryan to run for speaker. Hes got strong conservative credentials, but so, scott, did speaker boehner, and the right constantly accused him of caving every time he compromised. Paul ryans office says hes still a strong no. Pelley nancy, thank you. Today, the head of volkswagen u. S. Said the scandal that has wiped out a third of v. W. s market value was the work of individuals, was not a corporate conspiracy. He tried to explain to congress how 11 million diesel cars were rigged to cheat on emissions tests. Kris van cleave was there. V. W. S has betrayed a nation. Its time to clean it up or get off the road. I apologize on behalf of everyone at volkswagen. Reporter v. W. s u. S. C. E. O. Michael horn told a skeptical House Committee he only learned of his companys deception in september, days before the environmental of volkswagens diesel cars used software to cheat on emissions tests investigations were ongoing but this was not a corporate position from my point of view. This was a couple of Software Engineers who put this in for whatever reason. Reporter he testified that three Software Engineers were suspended, but Chris Collins wasnt buying it. V. W. Is trying to get the United States to believe these were a couple of rogue engineers. Reporter horn acknowledged it could cost the country billions of dollars and it could take years before the roughly half million vehicles were fixed. Some repairs could begin next year. Morgan griffith drives an affected diesel passat. They need to say we will buy your car back. Reporter e. P. A. Officials were also criticize for missing the defeat device discovered by researchers in west virginia. The e. P. A. s Christopher Grundler defended the agency under questioning from texas lawmaker mike burgess. Once we learned of the excess emissions, we focused on it. We didnt ignore it. I think the American People ought to ask that we fire you. Reporter e. P. A. Officials would not rule out the possibility of criminal charges and that came just hours after German Police raided volkswagens corporate headquarters. V. W. Announced they will not be offering the 2016 diesel cars here in the United States. Pelley and the engineers suspended are top executives, the head of research and development, the chief of engine design, and the head of brand development. Kris van cleave for us tonight. Kris, thank you. One of the americans celebrated as a hero for tackling a terrorist on a french train was seriously wounded today in a fight in northern california. Heres ben tracy. Reporter Surveillance Video shows six men just after midnight fighting in the streets of downtown sacramento. One man is covered in blood. Reporter the victim was u. S. Airman Spencer Stone who four times in the chest. Police say stone was leaving a nightclub with friends when he got into a verbal dispute with two men who then appeared to jump him. You all right . You look good. Reporter stone was hailed as an american hero, invited to the white house and given a purple heart in september. He and two friends traveling on a train to paris tackled a potential terrorist armed with a kalashnikov rifle, potentially saving many lives. Its critical that you know what this act is and what its not. Reporter Sacramento Deputy chief ken bernard. This is not a terrorismrelated incident, nor is it related to what happened in france months ago. cheers reporter when stone returned to sacramento last month, he and his friends were given a parade by the city in the same downtown streets where he was stabbed. Stone is being treated here at the u. C. Davis Medical Center in sacramento. We are told that he is out of surgery. Scott, the police say that his wounds are significant but they say he is expected to survive. Pelley ben, thank you. Today, the governor of South Carolina warned people on the coast that floods are heading their way. Columbia has already gotten the worst of it. Have a look at caughman road before and after, when a large chunk of it was washed away. David begnaud has one womans story. David. Reporter scott, it was sunday morning as an elderly woman was headed to church, and she got stuck right here. Before the road failed as the water was moving across, her vehicle stuck in the middle was pushed off the side and down about 20 yards into a ditch where she picked up her phone and dialed 911. On sunday morning in columbia, rescue teams were overwhelmed with calls for help. Reporter 71yearold clara gantt was one of those who needed help, and she needed it desperately. She was on her way to church when she got caught in floodwater. When did you realize you were in trouble . I realized it when my car stalled on the bridge. Reporter she called her family as Rushing Water pushed her car into the front yard of a church. I was afraid. I want to get out of this. Reporter all of a sudden, she saw her grandson, travis catchings. He had secured himself to a rope and float her way. I was so glad to see him but i was afraid for him, too. I said, hey, meemaw. And i smiled at her and she smiled back. She said, hey, trav. Said were going to get you out of here. Reporter he pulled gantt out of car and grabbed on to a large red cross in the front yard. Together grandmother and grandson held on for four hours while waiting. It was like being in the midst of a raging river. Yeah, clinging to the cross every day. Sunday, i was literally clinging to a cross. Reporter this grandmother is thankful for her faith and her grandson. He saved your life. I called him my hero but he doesnt want me to call him that. I love you, and thats thats what were here for. I love you you, too. Im glad youre here. Reporter if youre wondering what happened to that cross, it disappeared. It was last seen floating away. Scott, today, South Carolinas governor told residents along the coast they can expect to see more flooding as early as midnight as this water heads east. Pelley quite a story. David begnaud for us tonight. David, thanks. Today the state of michigan said it will pay to recorrect the city of flint to detroits water. We told ow tuesday the water in flint has unsafe levels of lead. The city of 100,000 had tried to save money with its own water system. It may be weeks before the water is drinkable again. Today, American DefenseOfficials Say some russian cruise missiles fired at syria may have exploded in iran. Russia launched 26 missiles from ships 900 miles away in the caspian sea. Iran is a russian ally, and there are no reports of damage. Russian planes are bombing Syrian Rebels who are backed by the u. S. , and u. S. Warplanes are in the same skies attacking isis extremists. Four years into that syrian civil war, half of the population, 11 million, has fled their homes. Hundreds of thousands are appealing for mercy in europe, but Charlie Dagata has found its not easy. Reporter like so many Syrian Refugees, Mohammed Bazav set hissitis on germany. We first met the 21yearold architecture student five weeks hungary, dodging police checkpoints. In berlin he told us he passed his first interview with german immigration authorities purpose were they asking you, you know, tough questions about were you in the military . Were you in the militia . Were you fighting . Where they asking you those questions . Me . Reporter yes. No. Reporter he was given the equivalent of 800 and told to come back in january for another interview. He is not allowed to work in the meantime. Right now, theres little to stop islamic extremists from slipping in among the migrants. The police take fingerprints and check them against International Databases like interpol. So many people here without i. D. , without anything. Reporter despite the initial warm welcome in germany, there has been a growing backlash against migrants, a spate of arson attacks, like this Sports Center just outside berlin that was to be used to house hundreds of migrants. By the time firefighters got here there, wasnt much to save. The police chief said the only blessing was the beds hadnt arrived yet, and neither had the migrants. The German Government has argued the migrants will provide a muchneeded workforce to offset the needs of an aging population. But gregoire, a berliner who we spotted outside the registration center, said not all germans are buying it. Thats what they are selling us these people for, you know, that they will pay our our our pension in the future and everything. I mean, we have five million unemployed germans, you know. I mean, so they cant even put their own people into jobs. Reporter germanys generosity towards migrants is being stretched to the limits. Charlie dagata, cbs news, berlin. Pelley and today, president obama appealed to americans to help the refugees, asking for online donations. So far, only a few have settled in the u. S. , and Margaret Brennan shows us why. Reporter like many syrians, chadi rustmos family home was destroyed by the assad army, leaving him only memories. Today, the 27yearold chef no longer fears for his life. What did you think when they told you youre moving to the u. S. . Actually, i was happy. My family will be safe. So it was like very thankful for this chance we get. I feel lucky. Reporter chadis family waited two years in lebanon before the u. S. Government completed their extensive background check. It was the longest interview in my life, like seven hours. Reporter seven hours for an interview. Yes. They asked me about my last five years what, i did, where i worked, what you are doing. All the details about your life. Reporter then came word that he had passed the test. The rustmos moved 6,000 miles away to a levy middleclass section of greensboro, north carolina. A local charity helped resettle the family, teaching them glrk Opening Bank Accounts and finding them homes. Maram is chadis 22yearold sister. What did you think life would be like here . Like what i see in the movies. Reporter is it like the movies . No, its not. Reporter she has faced some hostility. Giving me a hard time because of my accent, like, acting like they dont understand what im saying. Its like, okay, im different from different country, so why are you doing this . Reporter they worry about their brother, samer, stuck in lebanon, and their 70yearold father who lives alone in turkey. Both are still being vetted. We are not terrorists. Were just like normal humans. We have a family, and we have a life. And thats what we want. Reporter today, the f. B. I. Director said the u. S. Has gotten better at screening refugees to make sure they dont pose a terror risk. And, scott, the white house has pledged to bring at least 10,000 Syrian Refugees here in the next year. Pelley Margaret Brennan tonight. Thank you very much, margaret. There is a coral crisis. Why the reefs are losing their color. And a father and child reunion when the cbs evening news continues. Its easy to love your laxative when that lax loves your body back. Only miralax hydrates, eases and softens to unblock naturally, so you have peace of mind from start to finish. Love your laxative. Miralax. When my doctor told me i have agerelated macular degeneration, amd we came up with a plan to help reduce my risk of progression. And everywhere i look. Im reminded to stick to my plan. My doctor said Preservision Areds 2 has the exact nutrient formula that the National Eye Institute recommends to help reduce the risk of progression of moderate to advanced amd. After 15 years of clinical studies. Preservision areds 2. Because my eyes are everything. 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Reporter bleaching occurs occurs when coral is exposed to warmerthannormal water. The coral gets stressd and loses its coat of protection. If the coral remains exposed for long periods of time, it can die. Noaa says Climate Change is the primary cause. 2014 was the warmest year on record. So coming into this year, the oceans were already warm. We saw an almost el nino in 20142015. Reporter another factor is a warm mass in the North Pacific known as the blog, that combined with el nino has caused the worst bleaching hawaii has ever seen. The bleaching started late last year in the Northern Pacific and then spread to the South Pacific and indian ocean. Bleaching is also taking place in the florida keys and noaa says the caribbean is next. This is only the third time an event like this has occurred in recorded history. Last year we spoke with worldrenowned oceanographer sylvia earle in the keys. You lose only the creatures that occur there and nowhere else. Its thought we have already lost thousands of species that can never be recovered. Because theyre gone. Reporter noaa believes 5 of the worlds coral could be lost this year and, scott, next year is predicted to be even worse. Pelley remarkable. Jeff glor, thanks very much, jeff. In a moment, the chef who turned america on to cajun cooking. Im on the move all day long. And sometimes, i just dont eat the way i should. So i drink boost to get the nutrition that im missing. Boost complete nutritional drink has 26 essential vitamins and minerals, including calcium and vitamin d to support strong bones and 10 grams of proteinto help maintain muscle. All with a great taste. I dont plan on slowing down any time soon. Stay strong. Stay active with boost. Hey marc. How you feeling . 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, 1 in 3 people will get shingles in their lifetime. 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