In a u. S. Drone strike. The isis executioner targeted in the syrian city of raqqah. If this strike is successful, it will be a strike at the heart of isis. Kurdish forces entered the iraqi city of sinjar from all directions with the help of Coalition Air strikes. Donald trump came outline swinging at a Campaign Rally in iowa. This lightweight marco rubio, carly whatever her name is. How dare the press not believe me that i hit somebody in the face with a padlock. Accused of sending obscene texts to someone he thought was a teenaged girl. A man observed intentional going over board the more gene adjust pearl. Florent grosberg is awarded the medal of honor for tackling a terrorist bomber. The man accused of plotting the lufthansa heist at jfk. Two burglars making themselves right at home, laughing and drinking orange juice. All that. An emu on the run is captured in delaware. Rambo knocks it loose. Rambo in the middle of things again. Rambo responsible for three take aways tonight. Ryan is beginning the celebration. All of that matters. Saturday will mark the Second Democratic debate. I know its a Hillary Clinton and Bernie Sanders and the third guy is Martin Omalley. Martin omalley, right, thats the name. Donald trumps latest attack on Hillary Clinton is that her hair isnt real. Trump says he knows this because he saw her in line at his wig store. [ laughter ] announcer this mornings eye opener is presented by toyota. Lets go places. Welcome to cbs this morning. The pentagon is working to confirm if an american drone strike killed the notorious isis executioner known as jihady john. A United States official tells our david martin, quote, pretty god damn certain that they got him. Jihadi johns real name is mohammed emwazi. He was featured in videos that showed the execution of hostages, including several americans. And we have learned he was targeted thursday in a strike near the isis stronghold of raqqah. Jonathan vigliotti is tracking developments from london, where jihadi john was once a student. Reporter the u. S. Had been tracking him since wednesday. They got their chance after he entered a vehicle. Mohammed emwazi is best known as the knifewielding man behind the black mask, believed to be responsible for the beheading of several hostages, including american journalist james foley, and an american aid worker in syria in 2015. His brutality and anonymity at the time earned him the name jihadi john. The gruesome videos presented the world with a terrifying vision of the islamic state. This morning, british Prime MinisterDavid Cameron praised the u. S. Mission. He was intent on murdering many more people. This was an act of selfdefense. It was the right thing to do. Reporter mohammed emwazi, a british citizen believed to be in his mid20s, was born in kuwait but raised in london. He had a degree in computer programming. He first came to the attention of British Intelligence in 2009, who believed he was planning to join a terrorist group in somalia. He disappeared from his familys london home in 2013 and traveled to syria. His rise among the ranks of isis is unclear, as is what motivated his brutal campaign. Prime minister cameron also made clear the threat from isis is far from over, and the success of last nights mission is still to be confirmed, gayle. Jonathan, we thank you. The kurdish flag is flying in sinjar, iraq. Troops entered the strategic city hours ago on the second day of their battle to drive out isis forces who took the city more than a year ago. American war planes and advisors are helping the kurds. Charlie dagata is in sinjar where Officials Say its too early to declare victory. Reporter were now inside sinj sinjar. You can hear the gunfire rattling as gun battles are taking place on the east and west of the city. Were on the north side. We had to walk down this road in order to get here. The field is piled with debris and cables, thats one of the big threats, not stepping on a trip wire that might set off a homemade bomb, either inside the street other inside the buildings around. As they start clearing these roads, thats the biggest concern, the gunfire setting off a bomb. We watched this morning as just a handful of them started winding into the village, followed by dozens more. Theyre clearing out the city house by house, street by street, going after any isis militants that may remain here. Charlie dagata in sinjar, iraq, thanks. Isis claims responsibility this morning for one of the deadliest attacks in lebanon in years. At least 43 people died when two suicide bombers blew themselves up in a suburb of beirut. More than 200 were hurt. The blast badly damaged buildings. Crowds pulled out a motorcycle used by one of the bombers. The United States condemned the attack. In iowa, president ial candidate donald trump launched a stunning attack on his fellow republican frontrunner ben carson. Trump held almost nothing back at last nights Campaign Rally. He attacked other opponents, president obamas response to isis, and even iowa voters. Major garrett is in iowa with more. Reporter good morning. One of the questions that has surrounded Donald Trumps resilience is could his ego and temper stand sustained political competition. Last night he gave an answer, laced with profanity and insults, that could provide the answer. Im telling carly whatever the hall her name is, fiorina, would you stop cutting in . Reporter ben carson and Carly Fiorina arent gaining on trump. Marco rubio is. Rubio . Ready . Weak on illegal immigration. Like weak, like a baby. Reporter trump saved the lowest blows for ben carson, referencing the retired neurosurgeons description of himself as a pathologically angry youth. He said he has pathological disease. No. If youre pathological, theres no cure for that, folks. If youre a child molester, a sick puppy, a child molester, theres no cure for that. Theres one cure for that. We dont want to talk about that cure. Thats the ultimate cure. Theres two. Theres death and the other thing. Reporter for carson, the story of anger is part of his story of redemption. He plunged it into the belt and amazingly, the belt stayed totally flat and the knife broke. How stupid are the people of iowa, how stupid are the people of the country to believe this crap . Reporter and there was this reference to isis. I know more about isis than the generals do, believe me. I would bomb the [ bleep ] out of them. [ cheers and applause ] reporter trump went on for more than an hour with little regard for the fallout. And i dont care. I may leave here and you may say, thats not nice what he said. Who cares . I go back to my life. Reporter trump was more than 30 minutes late and his crowd, while large, remained largely subdued and unmoved. Carson is wellorganized here, his support loyal. Trumps broad sides could cost him dearly. If they do not, nothing else will. Thanks, major. Tomorrow is the democratic president ial debate. Twitter is one of our partners. Tweet us our questions for the candidates using th the dem debate. Watch the debate tomorrow right here on cbs. Well also have live coverage on cbsn. House Speaker Paul Ryan believes it would be wrong to dismiss political outsiders like donald trump and ben carson in the race for the white house. He says, i think its just such an unpredictable time that you cant bank on conventional wisdom. He opened up to scott pelley on 60 minutes. Have you spoken to the president . A number of times. Since you became speaker . Mmhmm. And the substance of those conversations has been what . On a number of different issues. Much of it about things we can get working together on, things we have to get done by the end of the year. And just courtesy issues. And we talked about having teenaged daughters too. But you found a man you can work with . Sure. Look, this is the job. Absolutely. Well, it hasnt been hes my president too. The job hasnt been getting done for the last several years. I agree with that. On your first day as speaker, you said you were going to wife the slate clean. Then in your first News Conference you said, quote, the president has proven himself untrustworthy on immigration. Thats not wiping the slate clean. Wiping the explain clean was about getting the congress, the house, functioning again. On this particular issue he tried to go around congress, violating the separation of powers. On that particular issue hes proven he doesnt want to work with congress. Thats not how laws are written. Watch 60 minutes on sunday to see speaker ryan on his home turf in wisconsin. Youll learn about his plans for Social Security and the tax code. Thats sunday, right here on cbs. There is new trouble this morning for the secret service. A uniformed white house officer is accused of sexting with someone he thought was a 14yearold girl. Lee robert moore is scheduled to appear in a Delaware Court today. A document says he sent an obscene photo to undercover detectives who posed as a teenager. Hes now on administrative leave. New details this morning about the firing of the defense secretarys senior military assistant. Secretary ash carter announced on thursday he dismissed Lieutenant General ron lewis after allegations of misconduct. Pentagon Officials Say lewis had an inappropriate relationship. Carter said, i expect the highest standards of conduct from men and women in this department, particularly from those in the most senior positions. Maris college in new yorks Hudson Valley is on lockdown had it morning after a threat on twitter. Classes are cancelled. Security is also ramped up at Howard University over an online threat of violence against the historically black school. Police are searching for a suspect. Jeff pegues is live there with more. Reporter good morning. Its a threat that students and in the administration are taking seriously. It started as a racist rant on social media. Whatever posted it wanted to take their frustrations out on students at howard. Whoever made the threat claimed to have been driven by the student protest on the university of missouri campus. He allegedly wrote, i left mu yesterday because i couldnt put up with it anymore. I go home to maryland and what do i say, the same old [ expletive ], the same old [ expletive ] causing trouble everybody. Security was increased but some students felt the university should have been done more. I think it should go on for the rest of the week until we know for sure its safe to come back to school. Reporter in missouri, days after celebrating the ouster of the universitys two to knp officials, students remained on edge after a man was threatening to attack the campus. Security cant be Strong Enough right now. We could use more protection from security at this point in time. Reporter 19yearold hunter park appeared in court on thursday. He was arrested after making threats on social media reminiscent of those made by the gunman in the october oregon shooting. The death lets that occurred with these young people who have been demonstrating. Unfortunately this is par for the course in terms of reaction. Reporter and there has been a wave of student activism at colleges and universities across the country. The dean of students at Claremont Mckenna college in california resigned after allegations that she made insensitive comments about latino students. Norah . Jeff, thanks. This Morning Police in indianapolis are hunted for the killer of a pastors wife. Investigators say 28yearold Amanda Blackburn was shot in the head. She was the mother of a toddler and she was pregnant. They believe the killing took place during a Home Invasion on tuesday. Vinita nair is following the investigation. Good morning. Reporter good morning. Such a tragic story. Hours before the attack, a robbery was reported a few doors down in their neighborhood. On thursday, police said her husband is not a suspect. Theyre still following several leads. The coroner officially ruled Amanda Blackburns death a homicide. Two days after the 28yearold was gunned down in her familys indianapolis home. On thursday, investigators ruled out her husband, davey, as a suspect. We dont have any reason to believe the husband is involved at all. Detectives have ruled him out as a possibility. Reporter Police Believe an intruder entered the house on Tuesday Morning and shot blackburn in the head. They say davey found his unconscious wife after returning home from the gym. Theyre oneyearold son weston, who was in the house during the attack, wasnt harmed. Amanda was 13 weeks pregnant. The greatest asset that god has to build his kingdom is the family unit. Reporter in 2012, the couple moved to form the church. We were set up on a blind date. Reporter they often used sunday sermons and online videos to discuss marriage and relationships with their church community. On wednesday davey posted a message, there is no way to prepare yourself for circumstances like these, he wrote. I hold firm to the belief that god is still good, that he takes our tragedy and turns it into triumph, and that the best truly is yet to come. Later this morning, the Indianapolis Police will hold a prescheduled press conference about crime in the city. Thanks, vinita. A new report suggests autism may be more common than thought. A Government Survey of parents finds as many as 1 in every 45 children is autistic, a higher percentage than other studies reported. Our dr. David agus is with us from los angeles. Good morning. Good morning, charlie. What does this report tell us about the frequency of autism . I think the headlines are somewhat misleading. Theres a questionnaire going to parents every year, and the questionnaire changed from 2013 to 2014. They changed the order of some of the questions. Parents who had said they had a child with another developmental delay now were switching them into the autism box. So it went from one in 68 to one in 45. The disease incidence isnt changing. But certainly our awareness of it is. This questionnaire, while it may be slightly more accurate, i think skews it a little bit. David, bottom line, more kids are getting diagnosed. Isnt that a good thing . No question about it. The real trend is, and this is encouraging, is identify it early, because you can intervene early and hopefully get a better result. What is the big question about autism . What is it . Where does it come from . We know theres a genetic link and we know theres a link between how old your parents are, how stressed the mother is. We know those associations, yet we really dont know the cause. And we dont have tremendous ways to treat it. So the research is early. We need a lot more research and resources in that field to make an impact. So whats your advice today, david, for parents who are watching, who are concerned . Parents who are watching, look at the data and look at the trends. If you space the child between two to five years between the first child to the second child, lower incidence. The less stressed the mother is, lower incidence. Look at the genetics of the parents. Were Getting Better at those genetic tests. The bottom line is vaccines do nothing in terms of autism risk and association with autism. And really focus on having a healthy pregnancy if youre the mother. Do all the things your doctors say. And keep that risk as low as possible. But still, autism happens. Dr. David agus, Important Information this morning, thank you. A couple says wrongly packaged Birth Control led to two miscarriages. Ahead, why they could have a pilots disio a pilots decision to evacuate a plane cost him his job. To our ground allegiant 864, were going to be evacuating. Hold off on your evacuation, please. Ahead, why Allegiant Air says it fired the pilot and what hes doing if response. The news is back in the morning right here on cbs this morning. Announcer this portion of cbs this morning sponsored by ocean spray. Its holiday time, and no fruit is as versatile as our ocean spray cranberries, which is why were declaring it the unofficial official fruit of the holidays. The figs gonna be so bummed. [ chuckles ] for holiday tips and recipes, go to oceanspray. Com. [ chuckles ] the wolf was huffing and puffing. Like you do sometimes, grandpa . Well, when you have copd, it can be hard to breathe. It can be hard to get air out, which can make it hard to get air in. 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