U. S. Government said Airline Security should be on the lookout for explosives concealed inside shoes and cosmetics. The details are still streaming in, and abcs senior justice correspondent Pierre Thomas brings us up to date on the very latest right now. Reporter tonight, Homeland Security officials are warning airlines that explosives hidden in shoes and other improvised bombs are an active, ongoing threat. Abc news has learned a new bulletin warns that terrorists are building shoe bombs, designing liquid explosives and explosives hidden in cosmetic containers to target commercial International Flights. No specific plot has been identified, but the new intelligence, developed from credible overseas sources, suggest that the terrorist bomb makers are fixated on these efforts. It certainly tells that you al qaeda is still fascinated with taking down planes. Recently had a toothpaste scare, now were going back to shoes. Reporter the new threat comes only two weeks after authorities warned of explosives hidden in toothpaste containers for flights headed to the sochi winter olympics. The new concerns over shoe bombs arise roughly 12 years after richard reed was caught on board a u. S. Bound International Flight trying to light his shoes. The shoe bomb containing a powerful plastic explosive could have taken down a plane carrying 197 people. Heres the damage it could have caused. The incident changed Airline Security forever. And to this day, when u. S. Passengers go to the airport, they almost always have to take off share shtheir shoes so they xrayed. But only weeks ago, Congress Held hearings on whether tsas continued concern was overkill. Everything weve done is in reaction. Take off your shoes, that was the liquids. Its all reactive. Pretty soon well be going through naked. Given the inconvenience there, do you think were going to see heightened security tomorrow morning . Reporter sources are telling me, look, they will do business as usual, but you may see additional security because Law Enforcement officials want to show have a sign of force that they are taking this very seriously. Seriously, but again, ranking it in terms of the intelligence, the specificity of the intelligence . Reporter right. This came from credible sources and they wanted to get this out to airlines as quickly as possible and to the tsa so everyone would be on notice that the terrorists are still thinking about these plans to take planes out of the sky. All right, Pierre Thomas reporting in again, our Justice Department correspondent. And now, we want to take you into the heart of chaos in ukraine. Chaos which could force international action, even by the u. S. Tonight, a city is in ruins, seen from above and a bloody battle is playing out on the ground, amid reports of a truce coming in tonight. Abcs chief Foreign Correspondent terry moran is right there. Terry . Reporter diane, that truce was announced by the ukrainian president late tonight. One day after he sent Security Forces into the square behind me, touching off a bloody battle. Theyre still out there. The fires are still burning. And tonight, there is no sign of a ceasefire. All day today and into the night, downtown kiev smoldered and burned. This city, and the world, still shaken by the terrible scenes that flashed from here yesterday. Protesters shot down. Police lines aflame. The dead lying in the streets. But this afternoon, when we clambered over the barricades, into the central square, we found thousands of ordinary ukrainians gathered again, young and old, men and women, undeterred, undaunted. They say they want freedom and democracy. This is the last war. This is the last chance for us. If not, we will fall down. Everything everything will be broken. Reporter at stake in this bitter struggle, will this country of 46 Million People turn west toward the u. S. And europe and democracy or turn east to Vladimir Putin and russia, which ruled here for centuries . President yanukovych, elected in 2010, but who now stands accused by opponents of massive corruption and of unleashing secret police on protesters he chose moscow. The u. S. Is pushing back. There will be consequences if people step over the line. And that includes making sure that the Ukrainian Military does not step in to what should be a set of issues that can be resolved by civilians. Reporter here in kiev, they are bracing for the worst. This is the front line. On this side, the protesters. On the other side, just 100 feet away or so, the police. And they are armed for battle here with their weapon of choice the stones, theyve torn from the pavement. Everyone pitches in out here. There is plenty of food, handmade sandwiches brought from home. And the beautiful cathedral of st. Michael, a makeshift hospital now, treating the wounded. Morale on the barricades is still high. As dusk drew down, they rose and sang ukraines national about anthem. The words of the cohorus, souls and bodies, we will lay down, all for our freedom. They mean it. This is a nation on a knifes edge, looking over into an abyss of possible civil war. And the question about that truce is, can it hold . The protesters are demanding new elections. The president is refusing. And the bloodshed has radicalized both sides. Diane . Terry moran reporting from the center of the story tonight. Thank you so much, terry. And now back here at home. We turn to the weather whiplash around this country. The big that you thaw, the falling ice and now the tornadoes roaring in behind the blizzard . Abcs meteorologist ginger zee tracking it all for us tonight. Reporter with the mild comes the wild. In manhattan, ice is falling from the sky. Right there, you can see it sliding off the tops of the buildings as it melts, crashing to the streets and sidewalks below. Chicagoans dodging the same. And the northeast, starting the day with one more blast of winter before the thaw. In pennsylvania, a scene weve seen too often this winter. A pileup on the highway near state college. Freezing rain forcing an unfortunate scrapbook of winter wrecks. From the bus sent skidding outside pittsburgh, to a snowy flip in massachusetts today. So, before we celebrate that brief touch of spring, the reality of a fast melt. Collapsing roofs. This one killing two cows inside a massachusetts barn. And instifli inin ining floodin. Almost a third of our nation is covered in that rapidly melting snow. Add a few inches of rain, and it could be trouble. And as it rains here in new york city, the major flood threat is west of us. Look at the seven states, at least tonight, that have a flood watch in effect. Thats, of course, the rainfall and all that snow. And then youve got severe weather. That would be tonights threat that youre seeing there, eastern kansas, southwest missouri, but it really explodes into our thursday afternoon and evening. Anywhere in the red there, indianapolis, cincinnati, memphis, nashville, jackson, mississippi, all could see damaging wind, isolated tornadoes and hail. Diane . A turbulent night. Thank you so much, ginger. And now we move onto a new warning from some of the nations top doctors. Are too many babies in america being born by caesarean section . Is it medically necessary . Or is it Something Else . Abcs bazi kanani now with this new report. Reporter an Alarming Number 1 in 3 women giving birth in america today, having a csection. And according to todays report, that number is too high. Csections, of course, can be a lifesaving procedure. But the leading obgyn groups behind the new report say, too often, csections are not needed. And they are real surgeries. They can lead to infection, severe bleeding. Erika cabrera says she suffered after what she now feels was an unnecessary csection. My incision did not heal. I wasnt able to breastfeed due to this. I also had a little bit of postpartum depression, i think it was increased because of this. Reporter among women giving birth, those who have planned csections have a three times higher rate of serious problems, including death. Yet, doctors often turn csections early in the birthing process, hoping to head off a complication for the baby. We live in the reality of litigation, so, i think sometimes obstetricians are leading towards, if i do the csection, you know, this is done and im okay. Reporter this is not always just a doctors preference. Ive had patients come in, say to me, i prefer to have elective caesarean section. Reporter todays report calls on doctors to exhaust all measures, to turn to csection only when medically needed. Reminding doctors and patients that the goal is a healthy birth for baby and mom. Bazi kanani, abc news, denver. And next, right here tonight, we head to sochi and the olympic games. And a big day for two of the most popular sports. The american athletes who play them, as well. Hockey, go usa, and figure skating. Were all eyes were on a 15yearold prodigy, and then, her heartbreak. Abcs matt gutman is there. Reporter when 15yearold russian phenom Yulia Lipnitskaya slides onto the ice, people expect her to dazzle as she did last week in the team competition. Gumby flexible, her signature moves are spins. That leg going beyond 180 degrees. Watch again as she rotates 15 times in 6. 5 seconds. But in the olympic pressure cooker, on a jump at the end of her program, lipnitskaya crashed hard. She completed her routine, but was visibly upset, finishing fifth. Minutes earlier, the steely nerved reigning olympic champion, ewe yuna kim, triump triumphed. Her signature move at last years World Championship a triple lutztriple toe loop combination. Watch again. Launching off the ice. Her shoulders and hips in complete alignment, the faster she goes, the higher she jumps. Helicoptering over 25 feet from start to finish. Yuna leads the pack today, going into tomorrows final skate. American gracie gold delivering a strong performance, is in fourth place. From the skates to the slopes, where today, ted ligety became the only american ever to win two Alpine Skiing gold medals. Watch this earlier run. Ligety blazing into the turns at over 80 miles an hour. Watch again, his body almost horizontal. His hips nearly brushing the snow, picking up even more speed. So what were going to do is use that odometer to try to get down that hill and time it, see how fast we can go. It felt fast, but we clocked in at barely 25 miles an hour. Woo watch ligety here. He tells us its all about technique. Were trying to stay super compact. Those tenths of a second matter when you are trying to win races. Reporter one more big u. S. Win tonight. The usa mens hockey team toppling the czech republic. Theyre in the semis with a shot at their first gold since the 1980 miracle on ice. But they wont be facing the russians this time. That team hanging up their skates after a humiliating loss in an event that Many Russians said is the only one that matters. Diane . All right, matt gutman reporting in once again. And a highflying competition of its own is under way back here at home tonight. The giant powerball jackpot, up for grabs. And abcs linsey davis tells us how big it is. Reporter its rolled over more than a dozen times since 2013, creating tonights 400 million powerball jackpot. The sixth largest in u. S. Lottery history and the largest so far this year, in what could be a recordbreaking year. We could easily 1 billion mark. Reporter ever since powerball doubled the cost of its tickets to 2, massive jackpots are becoming the new normal. This particular jackpot is just taking a little longer to grow. As a result of the extreme weather leading up to tonights drawing, fewer people were venturing out, as they are now, to buy tickets. Even with 1 in 175 million odds, powerball Officials Say the excitement is overshadowing the weather. Linsey davis, abc news, new york. And next right here tonight, how to fight the epidemic of drug tragedies weve been seeing. So many families trying to revive the crusade of an anguished father we all loved. You sleaze ball, you. Were going to get you. Parents trying to target the dealers tonight. Were back in two minutes. [ male announcer ] this is kevin. To prove to you that aleve is the better choice for him, hes agreed to give it up. Thats today . [ male announcer ] well be with him all day as he goes back to taking tylenol. I was okay, but after lunch my knee started to hurt again. And now ive got to take more pills. Yup. Another pill stop. Can i get my aleve back yet . For my pain, i want my aleve. [ male announcer ] look for the easyopen red arthritis cap. Millions have raised their hand for the proven relief of the purple pill. And that relief could be in your hand. For many, nexium helps relieve heartburn symptoms from acid reflux disease. Find out how you can save at purplepill. Com. There is risk of bone fracture and low magnesium levels. Side effects may include headache, abdominal pain, and diarrhea. If you have persistent diarrhea, contact your doctor right away. Other serious stomach conditions may exist. Avoid if you take clopidogrel. For many, relief is at hand. Ask your doctor about nexium. [ male announcer ] the rhythm of life. [ whistle blowing ] where do you hear that beat . Campbells healthy request soup lets you hear it in your heart. [ basketball bouncing ] heart healthy. [ mm. ] great taste. [ tapping ] sounds good. Campbells healthy request. Mm mm good. ® are over one million hours of research. Inside are specific vitamins and minerals to help support your heart, brain and eyes. Centrum silver. For the most amazing parts of you. Centrum silver. Imany Cold Medicines may raisee your Blood Pressure. Thats why theres Coricidin Hbp it relieves cold symptoms without raising Blood Pressure. So look for powerful Cold Medicine with a heart. Coricidin hbp. You want a way to help minimize blood sugar spikes. Support heart health. And your immune system. Now theres new glucerna advance with three benefits in one. [ male announcer ] new glucerna advance. From the brand doctors recommend most. And next here tonight, this past year, weve been seeing an epidemic of drug tragedy in america, leaving ordinary families and families of the famous asking, what can be done . So, tonight, we take a closer look at a growing question what would happen if dealers were charged with murder, if theres a death from their drugs . Heres abcs ryan smith. Reporter after the death of Philip Seymour hoffman, police, acting on a tip, arrested this man. Hes been charged with heroin possession, but not in connection with hoffmans death. Hes pled not guilty. In fact, we may never know who supplied the drugs that killed the oscarwinning actor. Police say theyre not investigating anymore, because no crime was committed. But with heroin use and overdoses skyrocketing in so many parts of the country, many are trying to find ways to hold those who provide drugs accountable. One law on the books in 17 states, the oconnor law, named for the son of the late carol oconnor, archie bunker in the show all in the family who lost his son to suicide related to drug use, told diane sawyer, he demanded accountability from the man he said supplied him with the drugs. You sleaze ball, you. Were going to get you. Reporter oconnor lobbied the California Legislature to pass the drug dealer civil liability act. Allowing family members of people injured by a drug dealers acts to sue for reimbursement for medical and rehabilitation costs. You know, ive actually heard people say, you cant blame the dealer for what we choose to do to ourselves. They may be an accessory in some way, but you cant blame them. Hes a partner in murder. Not an accessory. A partner in murder. Reporter and some prosecutors are now calling it a crime. Like John Molinelli of bergen county, new jersey. Its not just dealer, its supplier. It could also be a manufacturer. Everyone up the chain could be charged with first degree druginduced death here in new jersey. Reporter hes using a statute called the strict liability for drug induced death, that could land dealers in jail for 30 years. Prosecutors around the country trying to find creative ways to show drug dealers they mean business. Ryan smith, abc news, new york. And when we come back, a little boy shivering in the cold. What would you do . Wait until you see how these Good Samaritans really came through in our instant index. Im pretty sure the back door is locked. Anyway, what could happen in a couple of hours, right . [ male announcer ] when youre worried about things at home, its impossible to think about anything else. Adt gives you fastresponse monitoring for burglary, fire and carbon monoxide. Honey . You okay . [ male announcer ] plus, you can control your home from almost anywhere. Call now and get adt for just 79 so you can get back to date night. I have a cold with this annoying runny nose. [ sniffles ] i better take something. [ male announcer ] dayquil cold and flu doesnt treat all that. It doesnt . [ male announcer ] alkaseltzer plus fights your worst cold symptoms plus has a fastacting antihistamine. Oh, what a relief it is plus has a fastacting antihistamine. My feet felt so heavy at the they used to get really tired. Until i started gellin. I got dr. Scholls massaging gel insoles. When theyre in my shoes, my feet and legs feel less tired. Its like walking on a wave. Dr. Scholls massaging gel insoles. Im a believer [ chicken caws ] [ male announcer ] when your favorite food starts a fight, fight back fast with tums. Heartburn relief that neutralizes acid on contact and goes to work in seconds. Tum, tum tum tum tums how much money do you think youll need when you retire . Then we gave each person a ribbon to show how many years that amount might last. I was trying to, like, pull it a little further. [ woman ] got me to 70 years old. Im going to have to rethink this thing. Its hard to imagine how much well need for a retirement that could last 30 years or more. So maybe we need to approach things differently, if we want to be ready for a longer retirement. Still running in the morning . Yeah.