from new york for lester holt and everyone here at nbc news.holt and everyone here at nbc news. have a good night. -- captions by vitac -- www.vitac.com

lester holt will be here with you this weekend. i'm brian williams.pe to see you right back here on monday night. in the meantime, have a good weekend. good night. -- captions by vitac -- www.vitac.com

i'm lester holt reporting from new york. for all of us here at nbc news, good night.

i'm lester holt. >> and i'm jenna wolf. what an important day for the polish people. >> the start of the week of mourning for the president and others who died in the crash of the jetliner in russia. many are calling it the worst tragedy since world war ii. there's a sea of flowers outside the presidential palace and you can see thousands have shown up to pay their respects. we'll have the latest on the crash in just a minute. >> then we're going to have new information on the scandal involving that little boy who was sent back to russia by his adoptive mother in tennessee. there are reports that several families in russia have now expressed interest in adopting him. >> plus if there's a comeback dog, she's ruby. some are calling her a bionic dog. her story of survival and recovery. it is a happy ending. >>> we'll begin in europe with the day of mourning. today sirens rang as the country paused for two minutes of silence. while the bodies of the victims including that of the president began to arrive in poland from russia.

nbc lester holt explains why this era in american history is coming to an end. >> reporter: though nowutine they are moments that never cease to captivate us. the high flying adventure of manned space flight. >> it's the most wonderful thing i've ever seen. makes you proud to be an american. >> reporter: for almost 50 years the american spacecraft has been a soaring symbol of american prestige. with just three shuttle flights left and no funds, now nostalgia. >> it's bittersweet it's coming to in an end. >> one small step for man, one giant leap for mankind. >> reporter: it was a program borne of kmettion, the race to beat the soviets to the moon. >> achieving the goal before this decade is out of landing a man on the moon and returning him safely to the earth. >> reporter: eight years later the world watched neil armstrong do just that. some this weekend in alabama created their own moon recover. >> we thought it was cool opportunity. >> reporter: the opportunity of space flight have from the beginning been frought with risk. >> a major malfunction. >> reporter: the loss of challenger

captions paid for by nbc-universal television >>> this is "today" with lester holt and jenna wolfe. rom studio 1 a a in rockefeller plaza. >> welcome to today on this sunday morning i'm jenna wolfe. >> i'm carl quintanilla filling in for lester good morning on what will be a gorgeous day around much of the cotry. >> i have to tell you that jay z video it took me a month to memorize the words to on. >> you memorized that? >> that's not the point to the story. >> i have to remember the new hampshire version. it is easter sunday, we are talking about that. >> yes. >> as christians celebrate today the pope remains under intense scrutiny over past sex abuse. >> pardon goodness and truth, but made no mention of the abuse scandals. we'll have a live report from rome in just a few minutes. >> then the president hit the road last week touting his health care bill and solid jobs report. this week the focus turns to the international stage as he heads to prague looking to sign an arms reduction treaty. david gregory will join us in a few minutes. >> all eyes will be on tiger woods as he makes h

. >> meanwhile, lester holt, jenna wolfe are here to fill us in on what's coming up on "weekend." >>'ll join us. >>> also the controversy over so-called choice moms, single women who decide to have a child without a man in their life, and we're going to check out the newest attraction on the vegas strip. it is called the skyjump. i took the more than 865-foot plunge three times. >> i never thought i would see your mouth open any bigger. >> okay! i got it, guys. i'm loud and annoying. i pick up on that. it is called skyjump, the first time it is debuting in the united states. the "today" show tries to kill me -- i mean they sent me out to cover the story. i had a blast. >> what else we got coming up? >>> coming up in this half-hour, we'll show you >>> good morning. here we do have some clouds coming through on this friday morning. we've had some sunshine earlier, but around the region, temperatures are warming up. now we're into the upper 50s to near 60 degrees. and we ought to peak near 70 with clouds in and out throughout the rest of the day. and then cloudy tonight. we'll be in the

lesser holt with a preview live from new york. good morning, lester that's some rotten luck he's had a lot of folks suffering because of all this. the latest on the erupting volcano in iceland including more from chris jansing what they saw when they flew over the crater yesterday. it has strand thousands of travelers in this country and across europe. we'll talk with a pilot will the perils of flying through vol cain nick ash. also, we'll head to poland where that country is holding a state funeral today for its president and first lady who died last week in that horrific plane crash. then we'll go on a treasure hunt with amateur sleuths who unearthed lost gold at the dark ages and finally, why do men and women cheat in the secrets behind extramarital fairs. what motivates people to stay and is infidelity a deal breaker. kimberly, back to you in washington. >> adultery is a felony still in some states. those people better watch out. >> is it? >> yes. >> all right. thanks so much, lester. >>> it is 7:46 right now. let's check in with justin. justin, h

lesser holt joins us live from new york with a preview. good morning, lesteron, good to see you. coming up, we'll have the latest from poland on the lane crash that killed the country's president and many prominent leaders in poland being remembered in church services throughout that country. we'll have an update on the boy sent back to russia by his adoptive mother here in the u.s. this morning what neighbors are saying about that mother. >>> plus, we're going to pete a teenager who's about to become the youngest mayor in the state of wisconsin, just 19 years old. and finally ruby the comeback dog and her remarkable tale of survival. aaron, back to you now in washington. >> thanks, lester. >> a warning now for facebook users. be careful what you click on it could ruin your computer. the virus called koob face is also targeting twitter. mary peyton explains. >>> and net stewart spent at least three hours a day on facebook. >> before it was just mainly to communicate withriends and although i still do that, the main reason i go on now is the games. >> tonight,