good.>> are weekend looking >> pelley: on the eve of super tuesday, trump clashes with black lives matter protesters. >> get 'em out. get 'em out. out. out, out, out, out. >> pelley: also tonight, a cop is gunned down on her first day on the job. the big chain food company pleads guilty to selling parmesan that had no parmesan. and david martin with an american hero. >> it's five bronze stars, two purple hearts? >> that's correct. >> pelley: and now the highest military honor of all. captioning sponsored by cbs this is the "cbs evening news" with scott pelley.

clinch the nomination tomorrow, but super tuesday may generate irreversible momentum for hillary clinton and donald trump. they're favored many most of the 13 state primaries and caucuses. for democrats, it's a step towardrdertainty. for republicans another jolt in the party's identity crisis. polls show trump leading in at least six states, but he is trailing ted cruz in cruz's home state of texas. the republican race, heady, profane and unprecedented, now has prominent republicans talking of an independent candidate if trump wins the nomination. race became the weapon of choice today and major garrett is with the republicans. >> reporter: following the news that former kkk leader david duke was supporting g nald trump, a groupup of black lives matter p potesters interrupted a trumumrally in virginia. [bleeped] [bleeped]. a "time" magazine photographer tried to leave the press area to

were escorted from the venue. he was thrown to the ground by a secret service agent. photographer chris morris later admitted to cursing at the agent before the confrontation became physical. morris said the agent grabbed him by the neck and put him in a chokehold. >> i'm dealing with some real sleaze bags up here, believe me. i think the press is worse. i'm telling you. they're worse than the politicians. >> reporter: trumps make a sport of criticizing reporters and makes it clear protesters >> out. get out. out. >> reporter: trump's momentum toward the g.o.p. nomination has brought a sharper edge to his already-raucous rallies. marco rubio complained today the gutter rhetoric makes headlines. >> what a sad indictment on the state of the political debate in this country today. [applause] >> reporter: but yesterday rubio himself dove into the mud. >> and you know what they say about men with small hands. you can't trust them. you can't trust them. >> reporter: rubio is hoping

tomorrow to stay competitive in the delegate count while ted cruz is banking on a victory in hihihome state of texas. and we are, i belve, going totoave a b b chunk of delegates. and i think everyone else will be way, way, way behind. at that point it will become abundantly clear this is a two-man race. >> reporter: the secret service interviewed the agent involved at the trump rally. agency policy is to protect the candidate, not interfere with news gathering. the photographer involved, chris morris, has said he will not press charges. >> pelley: especially not after the way he provoked the agent. major garrett reporting for us. major, thank you. all of this followed trump's various responses to the support that he is getting, wanted or not, from the ku klux klan. today mitt romney said trump has en disqualified. here's dean reynolds.. >> reporter: campaigning in virginia today, donald trump was boasting again. >> we have amazing endorsements, and the people that really mean... we have hundreds of people now that want to endorse.

david duke, former grand wiz of the ku klux klan, may test his following more than ever. >> voting for these people. voting against donald trump at this point is really treason to your heritage. >> reporter: last friday trump seemed the say no thanks. >> i disavow. okay. >> reporter: but sunday he declined to renounce the kkk, duke or his support. >> i don't know anything about david duke. okay. i don't know anything aboutut what you're even talking about with white supremacy or white supremacists. so i don't know. >> reporter: trump eventually tried to clear up any confusion. >> i disavowed david duke all weekend long on facebook and twitter. >> reporter: he said a bad earpiece made it hard to hear the question about the kkk on sunday, even though he used the same one for several interviews. in any case it's clear some far right groups like what they're hearing from him. that's won the backing of the neo-nazi web site the dail stormer, for example, and the american national super pac is making calls in super tuesday states.

we need smart, well-educated white people who will assimilate to our culture. vote trump. >> reporter: the southern poverty law center, which tracks hate group, says that super pac was started by the white supremacist american freedom party. mark potok of the splc said trump's rhetoric is a coded appeal to racists. >> the idea that any mildly educated person in this country could not know what the ku klux klan was is perhaps one of the most ludicrous statements we've heard in mainstream politics in many years. >> reporter: the super pac backing marco rubio put hit the way. >> trump refuses to denounce the kkk. think about that. for president? >> reporter: donald trump has been heavily criticized before, scott, and so far his support for the nomination among voters in the party of abraham lincoln has held firm. >> pelley: dean reynolds reporting for us tonight. dean, thank you.

very good super tuesday for hillary clinton. here's nancy cordes. >> nancy:unanimous >> thank you! >> reporter: campaigning in virginia and massachusetts, clinton said the republican candidates are behaving like gray schoolers. >> remember the little box that used to be on your kids' report cards, "plays well with others"? i'd have to put a big no. >> reporter: she's poised to make the dean's list tomorrow. the latest cbs news battleground tracker shows clinton leading sanders by 20 points in virginia, 24 points in texas and 28 points in georgia. other polls have her up in massachusetts. and she's the former first lady of arkansas. that leaves sanders hoping for a strong showing in oklahoma, colorado, minnesota and his home state of vermont. >> we can win. no question here in minnesota. if we have the turnout. >> reporter: the two have found common cause in their distaste for donald trump.

hatemonger" online, clinton retweeted it. but otherwise she has begun to focus less on him and more on her likely race against the republican. >> one advantage i have is they've been after me for 25 years and i'm still standing. >> reporter: the state department is releasing its final batch of clinton's 30,000 e-mails tonight, but, scott, that does not mean that the saga is over. the f.b.i. is still looking into her use of a private server and a federal judge wants some of her top aides to testify about it. >> pelley: nancy cordes with the democrats tonight. nancy, thank you. well, john dickerson is our cbs news political director and anchor of "face the nation." at the top of the broadcast, we talked about the identity crisis with the republicans. what's going on with the party? >> reporter: well, if there is a wall between the republican party and donald trump, it's now ten feet taller. in conversations today with republican strategists and staffers at the hill, they are at wit's end about what it would

they pointed out in his interview that he seemed to be trying so carefully not to offend anyone and call anyone a bigot when he was asked about the kkk and white supremacists. suddenly he got politically correct. what they think, republicans i talk to think, is he was basically trying to not offend any southern voters. so in super tuesday tomorrow, what house and senate leadede worried about is whats it going to look like in the fall when they and their colleagues have to respond to every incendiary thing he says. people i talked to today were coming up with all kinds of fantastic notions about how they could take the nomination away at the convention or how they could put a third-party candidate if he became the nominee, slip a third party candidate in there. it's hard to tell whether they're more unsettled about being tainted by trump or by the fact there's not much they can do to stop him from getting the nomination. >> pelley: john dickerson. thank you very much, john. in ohio today, a 14-year-old opened fire on classmates in a

two students were hit, two others were hurt in the panic that followed. none of the injuries is life-threatening. the suspect ran away but was caught nearby. no word yet on a motive. in virginia, the funeral is tomorrow for the prince william county police officer who was gunned down on her first day on the job. today the prosecutor said he may seek the death penalty. here's justice correspondent jeff pegues. >> reporter: 28-year-old ashley guindon was a decorated marine corps reservist who was just beginning a new career a a a police officer. but her first day in uniform would be her last. >> all units respond. shots have been fired. >> reporter: on saturday night she and two other officers were responding to a domestic violence call at this home. as the officers approached the front door, they were shot. >> i know he's got a long gun. we got some people who need some

>> reporter: guindon was rushed to the hospital where she was pronounced dead a few hours later. the two other officers are expected to survive. police say 32-year-old ronald hamilton opened fire on the officers with a rifle. hamilton, a staff sergeant in the u.s. army, is also accused of killing his wife, crystal hamilton, in the home. the couple's 11-year-r-d son managed to run toafety. according g the ar, hamilton worked in i.t. at the pentagon for the joint staff support center. he joined the army in 2002 and served in iraq for two tours. prosecutors say hamilton had a previous run-in with the law but would not release details. prince william county prosecutor paul ebert. >> sad, sad, sad. it's an example of an officer's worst nightmare. >> reporter: officer guindon grew up in merrimack, new hampshire. in her 2005 high school yearbook she wrote, "live for something rather than die for nothing." guindon is the 14th police

duty so far this y yr. scott, 11 of the 14 wereilled by gunfire. that's a number that's risen dramatically compared to the same time last year. >> pelley: jeff pegues. thank you, jeff. turning overseas now, isis has been losing ground on the battlefield, but it's apparently striking back with a series of bombings in and around baghdad these past two days. more than 100 were killed. most at this marketplace in a shiite neighborhood. isis sunni the other main faction of islam. the u.s. ceasefire in syria is lding for the most part, but a atlineneet up by the u.s. . ate departmeme for syrians to all righgh violations has been ringing off the hook. the civil war has left many of syria's cities in ruin, and elizabeth palmer got rare access to homes. a city that once had as many residents as philadelphia but

>> reporter: after four years and megatons of explosives, the syrian army finally took back the city of homms from rebel fighters. but several rebels escaped into the suburb of al waar, where they tried the make a last stand. in the end, though, the violence was too much. undedesiege and outgunned, t t rebels caved in and agreed to talk. they're just out of sight at the end of that road. the syrian army wouldn't allow us in, but they do allow the women out to get medical care and to shop for food. what's changed? "now there are formal negotiations going on with the government," they tell me. "life has improved. the siege has ended and our electricity and water are back." supplies are flowing in, too, though every single box is checked by the military. and every canisterf gasoline

but now what? in december six bus loads of rebels and their families struck a deal for safe passage out of al waar to an opposition area further north. that leaves about 1,000 left. they're stuck, still trying the hammer out the terms of their defeat. there have been several of these, call them stalemate, call them minitruces, across the country in the last couple years, scott. they don't always go smoothly. some are more successful than others, but in the end they almost certainly save lives. >> pelley: elizabeth palmer in the syrian capital damascus tonight. liz, thank you. the label said "100% parmesan cheese," but it was 100% wrong. there's a new warning about a contraceptive implant used by hundreds of thousands of women. and the best of america awarded

evening news" continues. every day you read headlines about businesses being hacked and intellectual property being stolen. that is cyber-crime and it affects each and every one of us. microsoft created the digital crimes unit to fight cyber-crime. we use the microsoft cloud to visualize information so we can track down the criminals. when it comes to the cloud, trust and security are paramount. we're building what we learn back into the cloud to make people and organizations safer. i' been blind since bibih.

and stay awake during the day. learn about non-24 by calling 844-844-2424. or visit my24info.com. this is sheldon whose long day setting up the news starts with minor arthritis pain and a choice. take tylenol or take aleve, the #1 recommended pain reliever by orthopedic doctors. just two aleve can keep pain away all day.

>> pelley: if you love cheese, this news was pretty unappetizing. some parmesan contains wood pulp. an executive at a pennsylvania company plead guilty to selling cheese that had no relation to whatas on the label. we asked j axelrod to take a look. >> reporter: you would thk when f.d.a. investigators found castle cheese marketing 100% parmesan cheese that was actually 0% parmesan, the company had a problem. >> the product that they were marketing and which was on the label was not what they were selling. >> reporter: just attorney david hickton brought the case against the company after an f.d.a. inspection in 2012 found the company's parmesan was actually a mixture of cheaper cheeses like swiss and cheddar, and in one case an unknown ingredient.. >> advertising it as paaesan and romano and putting something else so the supplier could make more money.

consumer. >> reporter: this was fraudulent in your view? >> yes. >> reporter: but we found fraud might not be the worst of it. these f.d.a. records show finished cheese was stored in this unfridgerated room, which could cause bacteria to thrive. what's more, the company found listeria, a potentially deadly pathogen, in its production area ten times, but castle continued to produce and sell its cheese to stores like target and wal-mart without testing it. that migig be trroubling enough if we didn't alsfind records from the pennsylvania depapament of agriculture which inspected castle around the same time as the f.d.a. those records tell a very different story. in june of 2012, state inspector david trotter wrote, "the plant continues to be in excellent condition. i appreciate the plant management and the quality work they do." his glowing reviews continued until august of 2013 when he

agriculture for a new job. director of quality control at castle cheese. >> i'm with cbs news. >> reporter: we a aed trotter to explaininis reviews o o castle, but he to declined. castle cheese is no longer on the market. the company filed for bankruptcy in 2014. as for the f.d.a., it will be rolling outew food safety regulations. the f.d.a. tells us they're designed to help get state and federal inspectors on the same page. >> pelley: jim, thank you very much.

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white, and rock pointed out that's happened many times in the past 88 years. nielsen says the 44 million oscar viewers were the fewest in eight years. george kennedy won an oscar in 1968 for his role in "cool hand luke." he became a fixture in the disaster pictures of the '70s, including all four "airport" movies. he later showed off his comedic side in the "naked gun" movies. george kennedy died yesterday. he was 91. today the f.d.a. said it's issuing its strongest warning about essure, an implantable, permanent contraceptive device used by three-yearts of a million women. some have complained of chronic pain and bleeding. the f.d.a. ordered the manufacturer, bayer, to conduct a new safety study. it stopped short of removing the

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>> pelley: today president obama presented the medal of honor to a 36-year-old navy seal from ohio. david martin has his story. >> reporter: to call edward byers a combat veteran doeoe't come close. so am i reading here correctly, that's five bronze stars, two purple hearts? >> that's correct. >> reporter: so how many combat tours have you done? >> i've done nine combat tours. >> reporter: in 2012, as a member of seal team six, he was sent to rescue an american, dr. dilip joseph, who had been kidnapped by the taliban. as they approached the building, the point man saw they had been detected. >> he saw a guard come out of the door, and he shot him. and we started sprinting toward the door. >> reporter: the point man, nicholas cheque, went in first

>> i was the seconon person in. when i entered the room and saw another enemy standing there with a weapon, i shot him, and then i saw another person that was moving across the floor. didn't know whether or not that person was the american hostage or if he was an enemy, so i moved down toward him. i was able to get on top of him and pin him down with my legs. >> reporter: he was adjusting his night vision goggles trying to get a better look at the person beneath him when he heard dr. joseph call out from another part of the room. >> that's when i shot the person i was on top of and jumped off hihiand on to the doctor who was like three or fivee feet a ay. >> why d d you jump on the doctor? >> andy: we did that because we were wearing body armor and we want to protect him from any other potential threats. when i did, that i realized there was another enemy within arm's reach of where we're laying and so i was able to hold him against the wall by, you know, grabbing him around the throat and that was... that gave

get in there and to take care of that threat. >> reporter: when you say "take care of that threat," how did that work? >> our teammates came around and they shot him. >> reporter: you were holding him by the throat against the wall? >> correct, yes. >> reporter: when it was over, five talibib and one navy seal, nicholas cheque, lay dead or dying. dr. joseph was shaken but alive. how long did this last? >> probably it took a minute to actually go in the room and take care of everything we just talked about. >> reporter: that's a lot of action going on in a very confined space. >> that's the nature of this job. it's close quarters combat. >> reporter: and it takes longer to tell it than it did to happen. >> yes, it does. >> reporter: now there is a medal of honor to go with those five bronze stars and two purple hearts. you have to wonder how many ototr minutes off close quarters combat edward byers saw in his nine combat tours. one thing for sure, he'll never

david martin, cbs news, washington. >> pelley: and that's the "cbs evening news" for tonight.

around the this is "jeopardy!" please welcome today's contestants -- a pathologist from buffalo, new york... a graduate student from long beach, california... and our returning champion, an author fromomtlanta, georgia... whose 1-day cash winnings total... and now here is the host of "jeopardy!" -- alex trebek! [ cheers and applause ] thank you, johnny. thank you, ladies and gentlemen.