way to put it. it was beach weather here today. extremely warm, warm enough to present big challenges to these games. for the american athletes here in sochi it was another big day. and fair warning here, we know there is sensitivity, as well. we like to watch the olympics, too, we're not going to give away any results that have not been already widely reported today. nbc's chris jansing has our report tonight. >> reporter: it all happened so fast, a test run, and a worker was hit taken away on a stretcher with two broken legs. >> the track is busy, a lot of responsibility out here. it is extremely warm which i think may add to have more track workers dealing with the icy conditions. >> reporter: the unseasonably warm temperatures had the officials scrambling to keep ahead of the mountain snow. and more than a ton of salt mixture was put down on the cross country course today. >> when the snow is wet you put salt. it hardens the snow, because of the operation. >> reporter: women's cross country athletes competed in t-shirts, even a tank top.

and others banned clothing, as well. at ski slopestyle, no jackets, and a rare medal sweep for the u.s. men. we won't give away the placement. but one of them was gus kenworthy, who is getting a lot of tweets about four stray dogs, a mother and puppies he hopes to bring home with his medal. there was excitement for the women in the halfpipe, as well, bronze for kelly clark, and a stunner was kaitlyn fairi rrin farrington, the last snow boarder on the team. her happy parents had financed her travel by selling livestock. >> by the time i moved out of the house there were no cows left, they put evething they had into this. now it really paid off. >> reporter: and another stunner, the superstar, yevgeny plyushchenko pulled out of the singles competition because of injury. he had helped the russians win

gold. >> i was shocked because i competed with him and have known him for enough years to know he was very tough. >> reporter: it was that kind of day to expect the unexpected at the winter games. >> it is fantastic, summer, shorts. the sun is out, that is all you can ask for. so yeah, it is like california for sure. >> reporter: including 66 degree temperatures at the beach. also due to the weather the men's aerial practice today was cancelled. a ski race tomorrow moved to earlier to avoid the mid-day sun. and tomorrow's forecast, brian is for more warm weather. >> just another surreal day here in the mountains, thank you, chris jansing. and still ahead for us tonight. the fallout from a controversial new study about the effectiveness of mammograms after so many questions from viewers, dr. nancy snyderman is back again tonight with some answers. viewers, dr. nancy snyderman is back tonight with some answers. o is going to the dog park together. sometimes my copd makes it hard to breathe. so my doctor prescribed symbicort. it helps significantly improve my lung function starting within five minutes.

symbicort doesn't replace a rescue inhaler for sudden symptoms. with symbicort, today i'm breathing better. come on, boy! [ female announcer ] symbicort is for copd, including chronic bronchitis and emphysema. it should not be taken more than twice a day. symbicort contains formoterol. medicines like formoterol increase the risk of death from asthma problems. symbicort may increase your risk of lung infections, osteoporosis, and some eye problems. tell your doctor if you have a heart condition or high blood pressure before taking it. [ man ] now symbicort significantly improves my lung function, starting within 5 minutes. and that makes a difference in my breathing. today, i'm hanging out with my best friend. talk to your doctor about symbicort. i got my first prescription free. call or go online to learn more. [ male announcer ] if you can't afford your medication, astrazeneca may be able to help. ♪ [ male announcer ] bob's heart attack didn't come with a warning. today his doctor has him on a bayer aspirin regimen to help reduce the risk of another one. if you've had a heart attack, be sure to talk to your doctor before you begin an aspirin regimen.

[ coughing ] [ crying ] sorry. [ male announcer ] new robitussin dm max nighttime. fast, powerful cough relief that helps you sleep like a baby. robitussin nighttime. don't suffer the coughequences. i didn't think i could buy them their own, let alone for under $300. but this asus with windows is lightweight and has everything they need -- not like chromebooks that can't install office or have to be connected to the internet to get much done. with this they can do homework, chat, play games -- on their own laptop, and their own time. so no more fighting... at least not over my laptop. ♪ honestly, i wanna see you be brave ♪ we knew this would happen and we heard from a lot of viewers on our report last night on the large study on the

questions on the value of mammograms. the research in this case found they don't necessarily save lives. and many of our viewers found it hard to believe they did nothing, i'll put it this way, to help the confusion over mammograms. as expected we heard a lot from people like lisa jones who wrote, a mammogram saved my life at 39. in september, i'll be five years cancer-free. so dr. nancy snyderman is back with us. and let's try to personalize this. should women continue to get mammograms? and what would you advise your own daughter? >> mammography is not going away. and from one study, i would not advise my daughter, it is the cumulative stuff we're talking about, but nonetheless we're talking about the issue with women. and it has been criticized from the leading doctors in the field for some of the methodology. so for every woman out there here is the one thing you need to hear. you need to personalize this, figure out

your risk factors and talk to your doctor, figure out your risks for breast cancer and whether or not you should be screened. here are the risk cancers to consider, does breast cancer run in your family? and including in that, cancer of the ovary also, do you smoke? independent risk factor. how old are you? that is probably the biggest risk factor for breast cancer. what nationality are you? if you're black or white you can get a different type of cancer, and yes if you are overweight you are also at risk. now, all of these questions can be answered by your doctor, and increasingly, we'll see more answers and i hope, less confusion. but more of the conversation about routine screening and we'll really get a lot more answers as we crack open dna and we can really say you and your sister and your name are different people. different cancers and different risks. >> thank you as always for coming back, dr. nancy snyderman here with us.

we'll be right back in a moment with the news close to home with the mega merger that affects tens of millions of cable tv customers. this is a map of the pressure points on my feet. i have flat feet. i learned where the stress was at the dr.scholl's foot mapping center. then i got my number, which matched the custom fit orthotic inserts with the right support. find your closest foot mapping center at drscholls.com. i'm a believer.

what can your fidelity green line do for you? just take a closer look. it works how you want to work -- on your own... or with a fidelity investment professional, helping you find new ways to plan for retirement and save on taxes where you can so you can invest in the life that you want today. tap into the full power of your fidelity green line. call or come in today for a free one-on-one review. the day building a play set begins with a surprise twinge of back pain... and a choice. take up to 4 advil in a day or 2 aleve for all day relief. [ male announcer ] that's handy.

♪ to launch a startup from your garage. from computers, smartphones and 3d printers, to coffee, snacks, and drinks to fuel the big ideas. yes, staples has everything you need to launch a startup from your garage... mom! [ male announcer ] except permission to use the garage. thousands of products added online every day... even safety cones. now save big for your business with a $25 staples gift card when you buy a tablet. staples. make more happen.

our employers were in the news today after buying nbc universal from ge just a few years back, comcast has now reached a deal to acquire time warner cable in a $40 billion stock transaction. making our company by far the largest cable provider, promising their customers faster internet, more portable technology, but the ceo points out that is if this passes review from the federal regulators. >> there will be consumer advocates who oppose the deal saying it puts too much power in the hands of one company, this being comcast, our parent company, to control prices and to control to a certain extent content. that remains to be seen whether the u.s. government will agree.

>> and for his part, the comcast chairman brian roberts said we would not do this if we didn't think we could get it approved. and there is new fallout from the edward snowden revelations. according to a memo obtained by nbc news, snowden was able to get classified information because an employee allowed him to use the information and snowden was able to capture the employee's password. our national correspondent michael isikoff first broke the news exclusively on nbcnews.com. that civilian employee recently resigned from the nsa after being stripped of his clearance. that involves the sweeping investigation into what happened. our full report on it is on our website tonight. well, for those of us who are car people those pictures from yesterday were hard to watch. they looked like match box cars falling into that sinkhole at

the corvette museum in kentucky. they were all museum-quality corvettes, they don't have a damage assessment yet. once it is declared safe they will pull them out and fix them up. and chevrolet has stepped up to oversee restoring them. they have until august when a caravan of corvette owners is due to come to the museum for the 21st anniversary of the jamboree. when we come back, a kid who has been jumping for as far back as he can remember. it was different than the other times i tried to quit. [ male announcer ] along with support, chantix varenicline is proven to help people quit smoking. it's a non-nicotine pill. chantix reduced my urge to smoke. that helped me quit smoking. [ male announcer ] some people had changes in behavior, thinking, or mood, hostility, agitation, depressed mood, and suicidal thoughts or actions while taking or after stopping chantix. if you notice any of these, stop chantix, and call your doctor right away. tell your doctor about any history of mental-health problems, which could get worse while taking chantix. don't take chantix if you've had a serious allergic or skin reaction to it.

if you develop these, stop chantix and see your doctor right away, as some can be life-threatening. tell your doctor if you have a history of heart or blood-vessel problems or if you develop new or worse symptoms. get medical help right away if you have symptoms of a heart attack or stroke. use caution when driving or operating machinery.