get that bear. >> dan harris, tonight, takes us on the chase, armed with fearless dogs, scaring the bears into the trees. and this costume, well, scared us. good evening on this saturday. as we come on the air tonight, they are anxiously watching the floodwaters in the northern plains. along the souris river, the raging river is rising to levels never seen before.e. more than 10,000 people have now evacuated. and look at the pictures tonight. in parts of north dakota, entire neighborhoods under water. all you see are the rooftops there. this woman, in the city of minot, holding back tears as she looks at her home in the distance. and this sign, speaking for so many families there, reads preserve our homes. we want to take you to the live picture of the vast amount of water in the city of minot. and abc's david kerley will lead off us again tonight. david, good evening. >> reporter: good evening, david. some first good news for this city. this is about it. a couple more inches and then the crest. that's two feet below predictions. but it's still 12 feet above flood stage. look at the houses here. look at this debris. a boat on a fence line. there was nothing they could do here. but downriver, a frantic fight today. >> do you need diesel? >> reporter: connie, awakened by an evacuation siren, is on a mission. >> on the corner. trying to save my business. go. what are you doing? come on. let's go. >> reporter: nothing is slowing her, as she surrounds her steakhouse in ththtiny town of sawyer, with five feet of dirt, hauled and donated by her customers. >> she's a great gal. i don't want to see her lose her place. that's for sure. >> reporter: but you're talking about hours the water's going to be here? >> yes. it's already c cing this way. i think it's going to come this way. >> we have a low spot. we need to get sandbags here to build that up. >> reporter: the national guard swarmed in to fill up water barriers and new possessions to higher ground, as all 350 residents were ordered to leave. it looks like you've been invaded, basically? >> pretty much. yeah. came up this morning.. we got the knock on the door. rgeant came to the door and said it's time to come out. >> reporter: the brant family scurried to move out, before a new dike being built in the middle of the road cuts them off. finally time to go? >> that's what it sounds like. >> sounds like it. >> reporter: they are scrambling here because they've seen the devastation upriver in minot, where the water has washed away lives. toys floating downstream. ducks swimming where children would normally play. >> basement's gone. >> reporter: no one has ever seen this much water here. bill bender's basement is filled. his main floor is threatened. and he is feeling the strain. >> this is the only house we've ever been in. kids born here. you know? >> reporter: it will be another sleepless night for bill bender. the crest comes here at minot about midnight tonight. he won't see it until sometime overnight. and this water isn't going anywhere anytime soon, david. they expect the high levels for days to come. >> so many families, we're thinking of them all. david kerley, our thanks again to you tonight. there are new details about the deadly amtrak crash in nevada. a state trooper said the warning lights and the gates at the railroad crossing were working when a truck slammed into the train. as many as five people were killed, including the driver of that truck. dozens of passengers were injured. there are conflicting reports, tonight, whether the driver of the truck tried to stop. we're going to turn, now, to a milestone in the debate over same-sex marriage in this country. overnight, new york state lawmakers held a dramatic vote, now making it legal. governor cuomo then signing the law, takes effect in 30 days. making new york the largest state in america to allow same-sex marriage. the news triggering celebrations in greenwich village, the birthplace of the gay rights movement. we find t.j. winick with impact to this and reaction on all sides. t.j., good evening. >> reporter: david, good evening. this is where it all began, back in 1969, when riots sparked the gay rights movement. folks in the west village had set this as gay pride weekend. now, they have something truly historic to celebrate. when the news came late last night, these streets erupted. the same streets outside the famous stonewall inn, where the gay rights movement began 42 years ago, this week. >> ayes, 33. nays, 29. >> reporter: the new york senate vote is considered by many, a milestone in the civil rights struggle of our times. jeffrey and robert have been together for 18 years. >> i guess i always felt it was a slap in the face. like, we pay our taxes. we do everything accordingly. and yet, we're told we're not allowed to be a happily married couple. >> reporter: celebration came from far beyond new york, with celebrities cheering on twitter. rosie o'donnell, happy gays are here again. lady gaga, i can't stop crying. and ricky martin, time to celebrate. still, not everyone is happy. new york's archbishop, timothy dolan, who fought the movement, saying we worry that the family will be undermined about the attempts of government to redefine civilization. will other states follow? 41 states currently restrict marriage to 1 man and 1 woman. but public opinion seems to be moving towards acceptance. according to a gallup recent poll, 53% of americans support gay marriage. dramatically up from 15 years ago, when just 27%7% were in favor. >> i think this passage in new york is going to ratchet up on state legislative bodies across the country, on governors across the country. republican and democrats. >> reporter: while jeffrey and robert are eager for even greater change, for now, they will celebrate the victory and plan their big day. >> i think the second we can go down and register, we're doing that. then, we'll pick the date not long afterwards. >> reporter: gay marriage is expected to be an economic boone for new york state. it is projected to bring in $184 million a year. david? >> all right. t.j. winick reporting from new york. t.j., thanks to you. we turn to washington tonight, where president obama is taking control of those high-stakes talks with republicans to increase the nation's debt limit. the two sides now at an impasse. he has summoned leaders of both parties to the white house on monday. and economists say, if congress does not raise the debt ceiling, the u.s. would default on its bonds, sending economic shock waves around the world and increasing the chances of another recession in this country. let's bring in the anchor of abc's "this week," christiane amanpour i iwashington. christiane, you and i were talking. they made some headway on spending cuts. where does the impasse stand right now? >> well, it is at a critical juncture. a senior administration official tells me, in the talks with the vice president, members of congress have agreed to between $1.4 trillion and $2 trillion worth of cuts. but there needs to be more. what the republicans are saying is, no new taxes. while the democrats are saying and president obama said, we cannot cut our way to prosperity. the democrats say they need revenunuraising. so, they're hoping to persuade the republicans by closing loopholes and other issues. david? >> christiane, thanks to you. the senate republican leader and will be one of christiane's guests tomorrow morning on "this week." now, to another high-stakes battle, the campaign for president. the republican field will get more crowded when michele bachmann makes her candidacy official. at least nine republicans are now actively campaigning. tonight, a look at two of them here with similar resumes, backgrounds and faith. in fact, some have dubbed it the mormon moment. here's abc's jon karl. >> reporter: mitt romney and jon huntsman. one is the front-runner for the presidential presidential nomination. the other, the candidate the white house most fears. both of them share something that makes them different from anyone ever elected president. they are mormons. their campaigns are contributing to what "newsweek" has dubbed the norman moment. its cover, a play on "the book of mormon," one of the hottest musicals on broadway. ♪ i believe jesus has his own planet, as well ♪ >> reporter: the musical, by the creators of the raunchy "south park" cartoon, is wildly popular and critically acclaimed. but like most portrayals of mormonism in pop culture these days, it's less than flattererg to mormons themselves. there's the popular tlc reality show, "sister wives," and the hbo equivalent, "big love." it's a twisted and distorted view of the religion. polygamy was banned in the late 19th century. and is practiced today by only a handful of extremists with no official ties to the church of latter-day saints. but those negative stereotypes will be a challenge for romney and huntsman. in a recent pew poll, one ou four voters said they would be less likely to vote for a candidate if he or she were mormon. during the last campaign, romney felt the need to take the issue on directly with a major speech. this time around, he is deflecting questions on religion. >> i'm not a spokesman for my church. >> reporter: as for huntsman, he told abc news, he doesn't think voters will much care about his religion. >> i think they look at any of the candidates. where are they going? what do they stand for? i think they're going to make a decision, regardless of what someone's religious affiliation is. >> reporter: maybe so. but the ultimate mormon moment could be a mormon in the white house. there's one thing that could benefit both romney and huntsman. the mormon community has been proven to be a big base for fund-raising. a source of campaign dollars, david, that both candidates are tapping into. >> all right. jon karl on capitol hill. jon, thanks to you. 7,800 miles from washington and the race for president, first lady michelle obama and her girls continued their week-l-lg trip to africa. tonight, new images from botswana and their safari. you can see the first lady there. they saw a aelephant in the land cruiser. mrs. obama's mother, too, in front. they've been in africa, pushing efforts to end hunger, hiv and to empower young women. we were there with her this week. and in our one-on-one interview, we also asked her about politics back here at home. with unemployment at 9%, she knows her husband will face a fight for his second term. how do you handle the incoming fire? how do you deal with the economy? do you help him with that at night when he comes home from the job? >> i think he helps me, in a sense because he is so good at understanding that you just keep building. you don't keep looking back. you don't keep checking polls. you keep doing the work that needs to be done. and that's why i like him as my president. >> reportete do you at all dread the idea of going back out on the campaign trail? >> no. i enjoy campaigning. my campaign experiences have always been positive. and they're a way for me to stay connected with people. i'm going to be balancing it with family and all the other things that i need to do, as i always have. but i have always enjoyed campaigning. and i will do whatever it takes to get this president t ck in office for four more years. >> reporter: and it was this week on "world news," you heard the first lady tell us that she'd like the role for four more years, too. she's just begun to lay the foundation in so many ways. so, you like the job? >> i love the job. i do. i have the easier of the jobs. i get to choose my issues. my husband and all presidents don't get that opportunity. so, i think i have the best end of the bargain, truthfully. i get lots of upside. and i can watch the hard stuff and go, wow. good luck with that. >> reporter: good luck with that. our one-on-one with the first lady in south africa. we do have one more note from overseas tonight. in eastern afghanistan, a suicide bomber blew up his sport utility vehicle outside a health clinic. at least 35 people were killed, many of them when the building collapsed. dozens more were injured. the taliban says it was not behind the attack. there is still much more ahead on "world news" this saturday night. the alarmingngise in adult diabetes. now, being diagnosed in children as young as the fifth grade. what's behind this? we're learning more about the notorious mob boss caught. whitey bulger, the neighbor. what he would say and what he would give away. and this. >> get that bear. get that bear. >> on the chase tonight. our reporter on the alarming number of bears in the burbs. how are they catching them? 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[ pneumatic wrench buzzing ] [ slap! slap! slap! ] [ male announcer ] your favorite foods fighting you? fight back fast with tums. calcium rich tums goes to work in seconds. nothing works faster. ♪ tum tum tum tum tums and finally here tonight, the search is on in seattle. but you don't have to go very far to find the bears. that's because they're in many backyards there. dan harris, tonight, brave enough to show us firsthand, how they're caught. >> we'll find that bear. >> reporter: we are sprinting through a neighborhood in suburban seattle, chasing a bear. these wildlife officers have with them three, secret weapons, they're tracking on the gps device. they're specially-trained dogs, who are totally unafraid of bears who are five-times their size. there it is. yeah. wow. look at that. in my family, we have a golden retriever, who would faint if it saw a bear. what is it about this breed of dog they go for it? >> you know? it's just that ferocity. and that genetics. >> reporter: these dogs are now helping the people of suburban seattle deal with a growing problem. bears on the loose. >> this black bear on the run was about 200 pounds. >> reporter: wildlife officials here use the dogs to chase the bears up in a tree, so thehe bears can be tranquilized. >> finally, dropped out of the branches. >> reporter: wildlife officials release the bears back into the wild, using the dog to scare the bear more, so it knows never to come back again. while this is no fun for the bears, it is definitely in their best interest. before this, bears were not set free. they were put down. here's the basic problem. technically, bears are not coming into human habitat. we have moved into theirs. >> we don't want to kill bear anymore. we want to save bear. >> reporter: of course, when you're teaching bear safety, you need somebody to play the bear. i don't feel like a bear right now. now, i do. i was told to try my best to be a convincing bear. who has doughnuts? where are they? >> please, don't film this. this is -- you are probably one of the worst bears i've ever had. i hate to tell you. >> reporter: they put me in a bear trap. when they let me out, the kids and dogs would have to scare me so i wouldn't come back. that was awesome. this is the best assignment i've had in a long time. >> well, we knew dan harris was brave. that's the broadcast for tonight. we're always online at abcnews.com. don't forget dan and bianna, tomorrow morning, bruises and all. i hope to see you right back here tomorrow night. good night. 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