. >> that growth was gross differentiation factor 11, gh 11.e mouse's heart young again in 11 weeks. here in harvard researchers like dr. lee and dr. waige wager are trying to solve a problem. >> we developed a hypothesis that there was something in the blood because the blood has access to all these different cells. and might be able to communicate these signals. >> there must be thousands of items in the blood. how did you isolate this protein that you didn't even know you were looking for? >> we developed a relationship with somalogic in colorado. >> they helped identify the protein. >> it's kind of like having bar codes on thousands of post-it notes and by using those different colored post-it notes and finding the right things then they can pick out and check the bar codes and see what it was. >> all the researchers acknowledge that they still have their work cut out for them. >> i view the study as hopeful but i'm cautiously hopeful. i, for one, have not seen any study to date that shows these dramatic changes in the thickening of the hea

. >> high temperature today 29, gh at dulles 28. that is a new record low maximum. that's pretty impressive. we had full sun today, our last day of meteorological winter which is comprised of december, january and february. so happy meteorological spring tomorrow. let's start with a live look outside, our live michael and son weather cam down to 24, relative humidity pretty low, winds negligible. satellite picture radar combined, here's our monster storm just about to get ashore just hammering california. actually there's more disturbances behind that 1, but this is the one that will be our snow and sleet on monday as it moves across the country. in the meantime don't have to worry about much tonight, just a few high clouds. tomorrow it won't be a lamb or a lion, actually not a bad start to march. a winter respite over the weekend, 40s tomorrow, 50s sunday, maybe near 60 in some spots. travel will be very difficult monday. that may be an understatement quite frankly. storm time frame hasn't changed, 5 a.m. to 8 p.m. monday. stay off the roads on that time frame, 5 a

headed. psou plains but it's movi what it doi is it's changing into snow and that is going to accions be ghaltimore, philadelphia, we cou see 8 inche of snow in those areas perhaps as much as 12 in some locations and south a line of ice all the way from oklahoma through parts of arkansas and kentucky. we're going to be seeing very slippery conditions into those areas and behind it here comes le here in boston we missed ptoe cold air will plunge all the way south. than it was this afterno >> prepare and build in extra time for the commute. >>> out west they came prepared. look at this. umbrellas in hand but, mike, at least the tents came down. >> good news for them. rainstorms. tonight we're talking about rainstorms. tonight we're talking about temperatures dropp fro actually clearing away them. >>> the fast-moving developments in ukraine. pr putin with russianrsh words ukra crimean peninsula. this. ecreo state john ker kerry telling abc news russia's actions are a, quote, brazen act of aggression" and tonight the white house is considering all options. president putin, however, defiant tell

the kenya lucky to get an e that the part of china at me like they have a connecting flight to the gh not go another minute and kicking at the door five passenger to check into the light that never boarded the plane every airline and the like it or they happen to have actually gotten a praying wife were moved from the air like i need to read can carry during question and an intriguing theory that it can happen. karen and i think we all have to keep in mind that shared speculate that the plane and there's a lot that needs it he found out and learn about what happened that night. thank you for the sound enhancement reporting live from beijing the chinese reaction to the disappearance of the plane with close to two hundred and forty people on board. for you rival rallies a broken out across ukraine sunday spiking more tents and he already autonomous region of creamy as gearing up for a referendum on whether or not to join russia. thousands of people flock to the streets sunday to mark the bicentennial of the founding father of the ukraine's language and literature but the celebrations we

. >> today, western nations announced they will not participate in the gh summit the president vowed russia will pay a significant cost for the annexation of crimia. >> europe and america are united in our support of the ukrainin government and ukrainin people. >> m obama summit >> russian forces seized a base in crimia. >> phone messages between oscar pift torus and the girlfriend he shot and killed says she was sometimes afraid of him. there were exceptions. the couple argued about what she alleged was his short temper and jealousy. he shot and killed her on valentine's day of last year. he says he mistook her for an intruder. the state argues he shot her after an argument. >> a family of a dodger's fan is upset the man arrested was not charged. >> i want justice for my son. >> from her home, the mother of jonathan denver says she's outraged the man will not be prosecuted. >> i'm angry with the system. very devastated. >> in september he and his brother and a friend drove to attend a giants-dodgers game at at and t. as a fan they were also there to meet their dad, and celebrate his

as for that airbag study gh responded saying it was just pure speculation. >> bisi onile-ere in detroit, thank you. coming up on al jazeera america, why the fbi refuses to run nationwide background checks on people hoping to open a pot business in washington state. >>> also the great lakes are almost completely frozen over, and that causes big problems for the shipping industry. >> legal marijuana businesses are growing, but running into some hang ups in the process. the fbi will not run nationwide background checks on pool who have applied to open a legal marijuana business in washington even though it runs those same checks in colorado. it's just one drum tha dilemma e legal process faces. >> it looks like they're waiting for a solid word from above to tell them exactly how to handle this. this is a legal collision between the feds and the state of washington that has been waiting to happen since it wa is legalized, and fingerprints checks may be part of the vetting process for those who want to get into the pot business. state regulators have asked for fbi involvement but they have n

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hence the wet by annexationssell's gh deciding to trade deal with ukraine get rid of pests turks work their way around twitter band. the government telling a social networking site must agree to walk individual accounts. france's president gets back in his pre disaster. some crazy comparing. with the sf busy comparing government reference to that of the east german secret weeks. on top welcome back you're watching the world this weekend visits once again tanya brockman over a journalist and filmmaker whose upcoming documentary is about only in the arctic oil in the arctic was scrambling can say hydrocarbons. also with as christopher dickey of june beast. she's doesn't it the french news weekly magazine the match. atomic cover this week. interior jack says sentinel. and since i've done that in chief of friends twenty four dot com church got a bit of a shock this friday. twitter shut down by the government was intent is to go and soul of local elections with the country's prime minister growth in both a graft scandal and a power play among business which it may appear to want to be in d

. >> what would it take to see a gh versus a g7 and what would it take for russia to be involved? >> i wouldn't put it in terms of that institution and the meetings and the summits that it holds. i would simply say the suspension of reparations for that g8 summit are the result and that suspension is the result of the actions that russia has taken so that positive that would come out of russia reversing course might include restoring preparations for the g8 in general but i think the positives are far greater than that. jared. >> you described the costs to russia as real and significant and effective. can you at this point point to any hesitation or a reversal of course that russia has made due to the sanctions and the other costs the united states has put into place? >> jared i want to congratulate you on the penetrating question. i think it's very clear that russia continues to pursue a course that is in direct violation of international law that directly contradicts its obligations under international treaties and understandings of memoranda that has ukraine and other nations a

and that would really take us gh back into a cold war mold. it has huge strategic nuclear weapon stockpiles and just can't be wished away. so i think that end game issue isn't just what putin is doing. it's a question of how far is the united states willing to go in right now is an escalation of what is -- despite how big ukraine seems today, it's a rather small piece of the game between u.s./russia relations globally. >> and also of the president's strategy, anne. a lot of people are seeing this as the most critical test yet of president obama's strategy and going up against adversaries in a post-iraq, post-afghanistan world. is it? >> well, it is in a very important sense. russia is a project that president obama started on very early in his first term. the u.s./russian relations were at a very low point over another flash point, another crisis in georgia. there were a lot of other things that went into that decline but georgia really did it in. and we have had real deficit of communication and cooperation with russia. and that's something h

leading to the gh summit in june. >> it now appears that possibly germany has found that off ramp tont russian course that everybody has been looking for. after a call with putin, germany announced he had accepted a proposal to form a contact group, a fact-finding mission and a dialogue regarding ukraine. we haven't seen how that will work. it is being reported in a later call she describes speaking to putin as saying that he was out of touch with reality and in another world. jake? michelle, thank you. >> the stocks tumbled more than 100 points. let's bring in christine romans in new york. christine? >> jake, the last six or eight hours have been so dramatic in world markets. now, you have the u.s. market following suit. the dow down triple digits. six hours ago, dow futures were down closer to 200 points. they backed off some of that worse fear. you can see it is tough there. an exchange-traded fund, it trades here. the russian company, down about 7% right now. you are seeing global markets really moving. asian markets and european markets got hit. you had russia's main stock marke

obviously we should not go to the gh summit. he should be thrown out of the g.h. it should be the g-7. there has to be -- obviously suspend military-to-military engagements. we need to have a path and a quick one for both moldova and georgia to move into nato. both countries are occupied by russian troops. moldova and in georgia, and, by the way, every day quite often the russians keep moving the fence further and further into the sovereign territory of these countries. in an attempt to appease mr. putin we abandoned missile defense systems in poland and check check --, the czech republic. we need to reinstate those and move forward as quickly as possible. there's a number of things that the most powerful nation in the world needs to do. i'm not counting on our yiewn friends -- european friends, already there have been statements by and merkel and the -- awn debrisa merkel and leaking a memorandum from the british government. we may have to do a lot of things by ourselves because they're dependent on russia for a lot of their energy supplies and actually we have s

parties,gh he switched he was independent, now he is a democrat. i had a primary.dad was nearing the end of his life. are member going by to see him that day. -- ira member going by to see him that day. my dad had not been out of bed for a month and a half. he was fully dressed and sitting in the wheelchair. that night, he was going to go to my victory party. that night, by the end of the night, he could not make it. was that sosed, why important to him? the normal answer is that was your dad. it was so much more. my dad at nine years of age, his mother died and he had to go to work. he struggled, he never made a lot of money. he was never rich and was never famous. he wondered what his life was all about. do you know what gave his life purpose and meaning? seeing us being able to do the things he never could. evening us the chance to achieve the kind of life he wanted for himself. that was his american dream. that is why i know america is special. that is why i know she is worth fighting for. that is why i know that is what we will do. god bless all of you. thank

but they're really working gh s against time here. >> hopefully they can find it and figure it out.uch. >>> back to these families of the lost on flight 370. they have so few answers. so what is it like to lose a family member and have no idea what happened to almost or her ever? coming up, hear from a man who lost his brother more than ten years ago in a plane accident and still has no idea where he is or what happened. up late. thinking up game-changing ideas, like this: dozens of tax free zones across new york state. move here. expand here. or start a new business here... and pay no taxes for 10 years. with new jobs, new opportunities and a new tax free plan. there's only one way for your business to go. up. find out if your business can qualify at start-upny.com this is mike. his long race day starts with back pain... ...and a choice. take 4 advil in a day which is 2 aleve... ...for all day relief. "start your engines" peace of mind is important when so we provide it services you bucan rely on. with centurylink as your trusted it partner, you'll experience reliable uptime for th

and that's because an exception that was originally meant for gh paid white collar 23,660.s wins if you're making 23,,000 you're not high in management, right? if your salary is even a dollar above the current threshold you may not be guaranteed overtime it doesn't matter what you do is mostly physical work like stocking shelves. your employer doesn't have to pay you a single extra dime and i think that's wrong. it doesn't make sense that in some case this is rule actually makes it possible for salaried workers to be paid less than the minimum wage. it's not right when business owner who is treat their employers fairly can be under cut by competitors who aren't treating their employees right. if you're working hard, you're barely making ends meet, you should be paid overtime, period. because working americans have struggled through stagnant wages for too long. every day i get letters from folks who just feel like they're treading water. they're working harder and harder just to get buy bi-but it's always at the end of the month real tight. workers like the ones with me here today, they wan

pennsylvania,gh, independent line, go ahead. caller: i have a couple of comments real quick. whenever you have a president like obama draws red lines and says we will do this and then ,urns around and does nothing that shows weakness. the world we live in is not somewhere where we can just be friends and be nice. that is the goal. you want to be nice and trade with other countries. you want to be social with them or what not. sheer fact that we have a president who completely ignores the facts of history and the whole world and we will have crazy situations like syria refuses tor al-assad step down even though i think you should. i personally don't think we should get involved. we need to have a strong alitary and we need to have competent leader so this way the world is a safer place. i think the caller expresses a deep anxiety on the part of many americans that we should be strong and able to wield their military power in the world and keep order the weight we did during the cold war. -- at them with this same time as your caller expressed to me does not want to get involve

pennsylvania,gh, independent line, go ahead. caller: i have a couple of comments real quick.ver you have a president like obama draws red lines and says we will do this and then ,urns around and does nothing that shows weakness. the world we live in is not somewhere where we can just be friends and be nice. that is the goal. you want to be nice and trade with other countries. you want to be social with them or what not. sheer fact that we have a president who completely ignores the facts of history and the whole world and we will have crazy situations like syria refuses tor al-assad step down even though i think you should. i personally don't think we should get involved. we need to have a strong alitary and we need to have competent leader so this way the world is a safer place. i think the caller expresses a deep anxiety on the part of many americans that we should be strong and able to wield their military power in the world and keep order the weight we did during the cold war. -- at them with this same time as your caller expressed to me does not want to get involved in a