>> historic hearing. the nation's highest court takes up a high stakes debate over health care reform. in smoke. it was a dynamite deep six for the former home of the orlando magic. and a titanic achievement. film director james cameron journeys to the very bottom of the ocean. those stories and much more straight ahead. this is "first look" on msnbc. we begin this morning with a supreme show down. the justices of the u.s. supreme court take up the constitutionality of president obama's sweeping heathcare reform law. it's a decision that will have a broad back on america's health care system.

brian, good morning to you. >> reporter: hi, veronica. the health care law was sweeping in its scope and so is the challenge before the high court. from the moment president obama signed his signature, health care reform law, this day was inevitable. now it's time for the supreme court to scrutinize the most sweeping legislation in a nation. citizens have been waiting outside the high court for days. many are hoping to catch a glimpse of an extraordinary three days of arguments destined to make history. >> for this mother, the fight is personal. >> it's related to religious freedoms and religious rights in america. >> at the core of this case, can congress force every american to pay for health care? 26 states are qa'inging the law, including georgia.

>> we look forward to the supreme court holding the act unconstitutional. >> by the end of this decade, we're going to be glad the republicans called it obama care. >> reporter: it's safe to say the boundaries of government power. >> nbc, in washington, thank you. the one-month anniversary of trayvon martin. thousands are expected after a weekend of rallies and prayers. >> we come tonight praying for peace. >> reporter: a show of unity in sanford, florida. >> it's about pulling our community together in the wake of an absolute tragedy. >> reporter: a shooting that has sparked a national out cry.

prayers echoed across the country. normal church attire replaced with hoodies. >> we stand in solidarity. >> stop the violence. save the children. >> reporter: a growing refrain for justice for trayvon martin. he is george zimmerman, a community watch volunteer who shot and killed the 17-year-old a month ago today. his attorney would return to his claim of self defense today. >> george zimmerman sufficiented a broken nose, an injury, a gash to the back of his head. >> snow his friends are also seeking out. tears shed by thousands. most calling for answers and action. >> a gunman wearing an afghan uniform killed two groups today.

the victim's families are being compensated and the wipe is speaking out. nbc's john yang. >> reporter: the staff sergeant says she can't believe her husband would kill 9 afghan children and two others. >> when i asked what kind of dad he was, he was so involved with his children. he loves children. >> he's like a big kid himself. >> he is accused of killing nine children. >> reporter: right. >> innocent children. >> reporter: it's unbelievable to me. i have no idea what happened. but he would not -- he loves children. and he would not do that. >> reporter: in afghanistan, u.s. military officials tell nbc news they've paid about $50,000 each to the familyings of the

dead and $11,000 to the wounded. >> i any more than anything, it's to swage our oun guilt that this is happening. >> to some, it's not about the money. money will not satisfy us, he says. bales attorney tells us that the deadly rampage was carried out in two waves, allegedlily returning to base after the first attack and then slipped out again. >> that was nbc reporting there. here is your "first look" at some of the other news going on around florida today. more than 600 pounds of explosives.

the arena came down in almost 20 seconds. the o the. >> an oklahoma city police officer is under investigation at will roger's airport. police video appears to show police using a tazer on a man that try today go the wrong way at a check point. officers then dragged him as he was handcuffed from behind. the man claimed he wanted to give presidential documents. >> legend has it that up to 300 years ago, the red dwarf snapped a spell on the scene. an amazing basket from half court. yes, he did.

and almost elementary school tournament watched the one busy a hand was surprised. >> he helped his team win the game. put your hands together bill and karen. there's nothing more refreshing than that. >> did you have a depot weekend? >> i had a great weekend. i very much enjoyed the weather, but you're telling me it's a job. yesterday, beautiful weather in the middle of the country. what a weekend it was. probably the worst weather this weekend. but boston, it was 48. i mean, you went from being in in low 80s to mid 40s and rainy and school. cool. so that was a little slap in the face there yesterday. now, this morning, we're going

to watch the freeze line carefully. a lot of trees are out. the flowers are up into the ground. we're great into the reason for the most time of year. we have a storm system moving off the carolinas. and there's the cold front and the cool air 245's going to come in from canada. we're not missing too many other variables with wet weather. beautiful. look at this. the highs, runs again, in the low to mid 80s. even new orleanss. it's going to be sunny and dry.

it's going to be taking him to dinner 1234 gust. well, there's many spots that i looked at in new england where it's up the minneapolis. a little bit of ret root that. this will be a choke to the system. even as far sooth as washington, d.c. this time, tomorrow morning, we'll be in this 30s. if you notice, the big cities are in the 20s and 30s, that is that? >> for new york city northwards tomorrow morning, people will be complaining. skbl combat thing i did. >> yeah, wait. we're not quite done. >> the heavy hitter at the ballpark that does a bitty tom line. push mush ok, guys-- what's next ?

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>> who are are some of the top stories making news this morning. at a nuclear security summit in south korea, president obama urged china the reign in north korea over it nuclear plan. seoul frays they might shoot it down. all the some question, the 71-year-old getting a new heart, doctors say he probably did not get special treatment. pope benedict conducted a huge out door mass yesterday in mexico. today, he heads to cuba fer his first visit to the island. last night, the pope was given a chulaed system rare row by a

field pillages. . after traveling to the deepest point on earth, the dreck terre v titanic used a specially designed submarine to film a dive of welcome 7 miles. d dow opens at 13,808. the fells doc also gained four. taking a look at overseas trading this mesh morning, the hang seng was up a fraction. a little wlast ma hr tin swing back into the day this week? investors will also digest fresh data and personal income. ben will be closely watched for any clues about a round of

quantity stative easening. the supreme court wears a challenge to the your former this week. best buy is expected to see a rise in quarterly properties. >> in moan time, the dwindling share of the smart phone market. yahoo is appointing three more bed them behrs. third point llc. recently introduced a campaign that there was these four. >> and, finally, if you are not

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welcome back. in sports, there will be no cinderella story this year as march madness cms down to a face-off. here's nbc's mario solis. >> reporter: hi there, good morning. we begin with north carolina and kansas. ken cal marshal sitting this one out with a broken wrist and the tar heels could have used him. kansas pulls away in the final minutes. tyshon taylor. carolina trying to come back. travis fopishes on the other end. jayhawks end the game on a 12-0 run. they win 80-67. kentucky will join kansas. they were simply too much for bailor.

kentucky up 20 at the half. this is the kind of game it was for baylor. this they great a break with a missed free-throw. kentucky wins 82-70. they'll play rival louisville on saturday. the other big story yesterday afterwas tiger woods. his approach with a 18282 yards. putter has been a sore spot for tiger recently. but not anymore. tiger is leading by 5 strokes to win his first chore event since 2009. yes, tony stuart took the flag. it's his second one of the year. and finally, the hawks at jazz were having so much fun, they didn't want to stop playing. tied after regulation, they go into overtime and another and another and another. that's right, quadruple

overtime. george has 37 points. it took over three hours, but the hawks won the marathon 139-133. th that's your first look at sports. >> now, for another look at the eighth wither, here is nbc. have you heard of quadruple overtime? >> no, no overtime. >> good morning, everyone. hope you had a wonderful weekend. get ready for the big chill. we're at 38 right now in buffalo. and the winds are going to bring in the cooler weather during the day today and we'll feel it tonight. even with sunshined to, it's only going to be about 3 in albany. so, really, at the snap of the fingers, you've gone back. it's definitely a winner coat that day. maybe even the gloves. here's the shocking part. this will be the temperatures

here tomorrow morning. this will factor in the windchill. we'll be in 20s in many of the big cities. we could see teens or single digits. this is a one-day shot of very cold air. we'll watch that story tomorrow morning. as far as the rest of country goes, probably one of the worst areas as far as rain goes will be northern california, oregon. middle of the country looks dry and toesty. they are the ones continuing with our spring fling. >> everything is out. we're afraid that some of the stuffer that's not hardy. >> all right. thanks, bill. is she or isn't she? a dazzling engagement ring emerges. and the hunger games comes up next.

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a new study found that a growing number of parents regret the name that they gave their baby. they have a name for those participants. celebrities. mitt romney's advisor actually compared him to an etch-a-sketch. because of that, etch-a-sketch's sales jumped 15%. that's true.

anywhere you can compare romney to john carter? ? a medical marijuana store called linsanity. you get a huge buzz for two weeks and then it quietly fades away. >> tonight, jim worthington on your local nbc stakes. all right, it is time now for your first look at entertainment news. movie go ehers have a huge appetite for the "hunger games." the film taking in a whopping $155 million. the third highest u.s. opening of all tile. time. the highest ever for a nevin sequel. >> it looks like an all-you-can-eat buffet. the only one that opened more is

the harry potter, the batman sequel, the dreck knight. elsewhere in entertainment, miley cyrus sparked rumors by sporting what looks to be a huge diamond on her ring finger. a source close tells us that the sparkler is not an engagement ring. she's wearing it on the wrong finger. kim kardashian has decided to press charges against a protester who threw flowers at her. she doesn't feel that the woman should get away with it and that she should be held accountable for her actions. >> hunger games. i tried avoiding it this weekend. my brother saw it, my sister saw it and my mom is reading the book. now i have no choice but to get into it. >> stay tuned, willy guiese is up next.

porp push >> breaking news out of afghanistan this morning where a man shot and killed two international service members inside a nato base in the southern part of the country. this as matt lower talks first time to the staff sergeant charged with 17 civilians earlier this month. the question is how much more of this steady stream can the american people take? >> back out on the come pain train. the question is, with another southern win and ever-intensifying rhetoric against romney, is there really any sign santorum is looking to get out? >> tiger woods with his first pga tour win since september of 2009.