Country star loses her courageous battle with cancer. And the case for Driverless Cars. From safety to savings. The reasons why we will soon be able to take our hands off the wheel. But we begin this morning with a look at todays eyeopener. Your world in 90 seconds. Get him out get him out of here i cant believe that in louisiana, it takes this long showdown saturday. President ial candidates square off in five more states. With just four republicans left in the fight for the gop nomination, donald trump is looking to extend his winning streak. Donald trump is skipping cpac. I think someone told him megyn kelly was going to be here. A lot of people who love me, they just wont vote for me, but its okay. Hillary clinton and Bernie Sanders campaigned in michigan. We have got work to do lets join hands lets lift ourselves up. Vote on tuesday, we are going to win here new developments in the o. J. Simpson case. Sources tell a knife just revealed by police does not appear to be the same type of knife used to kill Nicole Brownsimpson and ron goldman. A homicide still ongoing. A successful launch for a spacex rocket and landing on to a drone ship failed yet again according to elon musk on twitter. Joey has died and she was diagnosed with Cervical Cancer in 2014. She was just 40 years old. And all that matters. The final field goal of the Third Quarter and it goes in oh, he hits it from halfcourt on cbs this Morning Saturday. A shoutout to astronaut scott kelly. Seemed like i lived there forever. This guy was in space for a year. Can you imagine that . Got back to earth this week. They told him trump was going to be president. He got back on and said im out of here welcome to the weekend, everyone. We have a great show for you this morning. A bit later, were going to take you to wales and introduce you to a craftsman who makes some of the worlds most soughtafter Musical Instruments. But while it takes days to make race against time. His incredible story ahead. Also, chef Matt Jennings runs one of the best restaurants in the county. Find out how a summer job at a Grocery Store ended up being the catalyst for his career. And in our saturday session, the soul of the south meets rock n roll. The Network Television debut from seratones is ahead. Our top story this morning. Casting ballots in caucuses and a primary for president ial candidates today. Its only to add tension to the already heated race. Last night, demonstrators were night. Trump was trying to rally voters president ial primary in trump is the partys frontrunner by a wide margin. But other republicans are working to keep him from winning the partys nomination. Major garrett is in our Washington Bureau with that. Major, good morning. Good morning. Another state to watch today is kansas. Famous for moderate republicans. Dwight w. Eisenhower and bob dole and kansas is the battleground over the soul and the Republican Party. Cruz and rubio made play for the state and its 40 delegates. We had john mccain, he lost. We had mitt romney, he lost. I back this one and back that one. Next time, i said im just going to do it myself reporter donald trump today sought to take control of the Republican Party the day after clashing with his rivals at the 11th gop debate. This little guy has lied so much. Here we go. About my record. Here we go he has lied so much reporter the rift between trump and the republican establishment continues to grow. Trump cancelled his scheduled saturday appearance before an annual conference of conservative activists, drawing ridicule from ted cruz. He was told there were conservatives that were going to be here reporter those conservatives were skeptical of trump. If he doesnt show up he is dodging what goes on here. He doesnt represent our donald trump is a phony, a fraud. Reporter as mitt romney and deny trump the nomination, Republican NationalCommittee ChairmanReince Priebus said the turmoil would not hurt the partys chances in the fall. Mr. Chairman, is your party coming apart at the seams . Not at all. And intrigue and i think good for our party. Reporter what are the probabilities of an open or contested convention . You know, i dont know about that. I still believe that its likely that we wouldnt go to a Contest Convention but, you know, whatever the case is, we are going to be prepared. Please i know its hard not to interrupt. Its not what you said. Breathe, breathe. Lyin ted. Reporter despite the rancor at last nights debate, all the candidates pledged to support the eventual republican nominee. Thats how bad Hillary Clinton is the fact we keep getting asked will you vote for the frontrunner as a republican tells you what a flawed candidacy it is. Reporter retired neurosurgeon ben carson announced the end of his candidatesy yesterday. Saying in an interview, that the reason for he dropping out is because of poor staffing and lack of press conference. Major garrett in washington, thanks. On the democratic side, contests are being held today in kansas, louisiana and nebraska. Both Hillary Clinton and Bernie Sanders are focusing on which has more delegates than the three states voting today combined. Nancy cordes has more. There were so many insults flying back and forth. It was hard to keep track. Reporter in detroit, the Republican Debate drew a brief mention from clinton but she quickly turned to michigans economy, taking a tough line on trade in a state hardhit by outsourcing. And we dont take action until after the damage is done. Which often means after workers are laid off. That is ridiculous. Reporter in traverse city, sanders argued he not clinton has consistently opposed freetrade deals. Nafta and trade deals with china have cost this country decent paying jobs. Reporter the delegates both visited waterstricken flint, clinton more than once, they to solve crises like that one when they arise. Or cbs this Morning Saturday, im nancy cordes in washington. We are joined by jamelle buoy. Good morning. Reporter period we heard from nancy and major. Everyone looks like they are taking swings at donald trump. The gloves are off. How does it help him . I think in this stage you have the entire republican establishment going at him, it helps him. The argument is at the establishment not listen to the ordinary voters i will protect you and fight for you and do deals for you. And the establishment going at him like this this hard this late in the process is a sign to his supporters that, oh, trump must be doing something right here. He must be everyone take him down right now. He must be on the right target. We heard in majors story that the Republican Party chairman Reince Priebus saying the party is not coming apart. This is drama and intrigue. When i hear that it seems like chairman priebus is in a fire and telling everybody everything is okay. I dont think its that at all. The fact they are talking about a brokered convention, the fact they are openly discussing can we coop or get rid of trump at the convention is a sign this party is cracking apart under strains developing a long time. A close primary and caucus states only registered republicans can vote. How does that affect them . I think it gives a boost to the other candidates. Trump does well with registered republicans. He has won them in most of the contests he has won, but a lot of his support in open primaries has come from people joining in or jumping in to vote for trump. I think rubio and cruz and kasich may do better and have a chance to block him in some places because its a close primary i wouldnt count on the fact its registered republicans to save them. Trump voters to vote for other candidates. We saw the support for the gop nominee, even if it is trump. Does that undermine the attacks against him at this point . I think it completely does ordinary primary politics. The argument from romney, even from rubio and from cruz is this is extraordinary, that donald trump is a threat not just to the Republican Party but to everyone. Then to say after i that support him in general and undermines it and says to voters dont take this too seriously. They dont need to endorse democrats but i think they should be willing to say we are willing to lose if that is what it takes to beat donald trump. I think that sends the serious message that the voters need to hear. What is your assessment what is happening on the democratic side right now . Hillary clinton has won seven states. Is it a momentum issue . Is there anything ahead of for her that youre weary of . The next couple of states and march 8th and 15th primaries is states good for sanders and he should be able to capitalize on well with the africanamerican and latino voters very much suggest her path to the nomination is secure because they make up an important part of the voting population and delegaterich states like michigan, ohio, pennsylvania, california, new york, so on, so forth. Unless sanders can crack into that trunk hold that Hillary Clinton has he doesnt have a path to the nomination even as he will continue to do well in states going forward. Always interesting. Thank you very much. Thank you. Los Angeles Police are conducting dna tests on a knife reportedly found buried on simpsons Properties Years ago. Simpson was accused in the murders of his exwife Nicole Brown Simpson and her friend ron goldman. But police never found the knife that prosecutors claim he used to kill them. Simpson was acquitted in a lengthy public trial. As carter evans reports, while investigation seriously, they caution it could turn out to be another false lead. I was really surprised. Reporter the los Angeles Police department was stunned when a retired Police Officer recently turned in a knife that was allegedly found nearly two decades ago by a construction worker during the demolition of o. J. Simpsons estate. The offduty or retired officer was working in the area of the Rockingham Estate and he claimed that an individual who worker provided him with this knife, claiming that it was found on the property. So he held onto it. Reporter that former officer has not been publicly identified but he is believed to have the knife many years before turning it in about a month ago. Retired lapd detective tom languagee was the detective on the case and said sompss property was thoroughly overlooked. This knife, i would be very surprised if we would missed Something Like this. Reporter the knife that could have tied simpson to the murders has never been found. During his trial, simpson famously tried on a bloody glove discovered at his office and that evidence was dismissed by his attorney johnnie cochran. If it doesnt fit, you must acquit. Marcia clark was the prosecutor in the case. Clark spoke to entertainment tonight. If it does turn out to be connected to the murders of ron and nicole, it would be interesting if there was some evidence on that knife that pointed to who might have helped to bury it. If, indeed, someone else did. Do you know what is going on here . O. J. Is in the back seat with a gun to his head it comes as a cable miniseries and it has renewed interest in the case. We dont a situation here and we dont want anybody to get hurt timing at the miniseries on the o. J. Case and all of a sudden they come up with this knife . Its going to raise some eyebrows. Reporter lapd investigators say this new Knife Development could turn out to be, in their words, bogus. Mr. Simpson, would you please stand and face the jury . Reporter even if its not, according to carl douglas who was part of simpsons defense team, it will be of little significance to his former clients. Not guilty of the crime of murder. The case is over involving o. J. Simpson. He can never be prosecuted for those crimes again. So what i would say for anyone who is grasping for straws is, please, to move on with their life. For cbs this Morning Saturday, carter evans, los angeles. Heavy rain is falling across Northern California this morning. Its part of a powerful storm the nation in the week ahead. River flooding is possible. Southern New Hampshire snow caused a 40car pileup on an interstate on friday and ten drivers had to be hospitalized. Hillary clinton and Bernie Sanders are set to debate tomorrow night in flint, michigan. The city struggles to address Significant Health concerns from lead found in its drinking water. Yesterday a crew dug up a corroded pipe out of a home where a mother and 8yearold girl lived. Pipe. One down and 8,000 left to go. Adriann diaz has that part of the store. Im tony. One of the nurses from the health department. Reporter nurse tony larocha is checking on this little girl. Was lower. Department will make today. Part of a citywide effort to keep track of kids with lead poisoning. How has the load of homes you have to visit increased . Its gone up huge. Numbers of families that we are seeing has exponentialally grown. Reporter when you were first told your daughter had high levels of blood, what went through your mind . I was very afraid because of how young she is and i didnt know the dangers of it. Reporter five months after flint switched its water supply back to the lake huron, a thousand homes have Dangerous Levels of lead in the water and 72 children are still testing positive for high lead levels in their blood. But only half of flints 8,000 children under 6 has been screened. Because testing is voluntary. Since lead can remain in the body for decades the state is Flint Residents for years. But stephanie says until all of the lead lines are out she will be afraid how the water is affecting her daughters future. Its making me want to leave the city of flint, to move just because of the water and everything. Its frustrating reporter the city says right now, there is only enough funding to replace 30 lead pipes out of 8,000 flints recovery will likely be a recurring theme in sundays democratic debate that is being held right here in flint. For cbs this Morning Saturday adriana diaz, flint, michigan. A new round of peace talks to end the fiveyear long civil war in syria is set for next week in switzerland. Elizabeth palmer was given rare access to the city of aleppo for a look at conditions there. Market of aleppo had endured until a thousand years, until this war. The bombs and shells of syrian soldiers battling rebel fighters. Until at last, the army won. But at the cost of this protected jewel. Now the whole area is quiet, except for a handful of soldiers on guard and the occasionally definitely not quiet are the residential neighborhoods crammed with people and many of them having fled from fighting elsewhere. In this front line in this city, tarp shield residents from snipers. They get their water from primitive wells drilled straight down through the roads. Can we come up and see you . This family invited us inside. Theres no Running Water or electricity. In their tiny apartment, the mother explains her son, a soldier, was killed in action. Without his salary, everyone, charity. Downstairs, there is a soccer game. Hammad is pretty fast on his crutches now. A year since a rocket took off his leg. Are you coming back from school . No, he says, i was doing errands with my mom. People can still do errands in aleppo and shop for food in the parts that havent been smashed to pieces. And since the ceasefire, the mood has lightened. But even as a new round of peace talks are scheduled to start next week, everyone knows that on the other side of town, the syrian army is tightening its siege on the rebelcontrolled section of aleppo. In the immediate future, conditions for thousands of people may get each worse. For cbs this Morning Saturday, elizabeth palmer, aleppo. Time to show you some of this mornings headlines. The New York Times reports two connection between the zika virus and serious birth defects. One showed pregnant women who tested positive for the virus delivering babies with tiny heads, nerve damage, and possible blindness. Another report indicates how the virus works to destroy cells which make up portions of the brain. Experts say although the studies were small, they still underscore the dangerous effects of the zika virus. Nashville reports closing arguments made friday in the case of erin around who peds 75 million after secretly videotaped photos were made public of her in a hotel room. The hotel says the blame lies with the stalker. The boston globe reports a committee at Harvard Law School is proposing the school choose a new logo. The recommendation follows a to the shield which represents a family that owned and abused slaves. The symbol has been used at harvard since 1936. The University Says it will review the proposal and make a decision in the coming weeks. The Atlanta Journalconstitution says the Atlanta Falcons are apologizing to a player after he was asked an inappropriate question. Ohio state student eli apple says a coach asked him if he liked men at the nfl scouting combine. Apple said he was caught offguard by the question and it prompted him to go public. The Falcons Head C