advance. tehran says it's now enriching uranium at a secure underground location. bill plante has u.s. reaction. >> with two days until the new hafern primary, republican challengers target mitt romney. jen crawford, john dickerson and chip reid are on the campaign trail. tucson remembers the shooting rampage that kicked six and wounded 13 including congresswoman gabbie giffords. ben tracy looks back one year later. and birthday kate, mark phillips tells us how the new irs royal is celebrating the big 30. >> this is the captioning sponsored by cbs this is the "cbs evening news"

>> good evening. iran told the world today that it has taken another step in its nuclear program, enriching uranium inside a new underground facility. and that wasn't the only sign of defines from iran today. bill plante is following this story from the white house. bill, good evening. >> reporter: good evening. the announcement of the new uranium facility appears to be iran's response to the possibility of new u.s. sanctions against its oil trade aimed at persuading iran to stop its nuclear program. >> our red line to iran is do not develop a nuclear weapon. that's a red line for us. >> reporter: iran's new uranium enrichment site is deep underground, less vulnerable to attack by the u.s. or israel. even so, on face the nation today, defense secretary leon panetta made it clear that the u.s. will not allow iran to make a weapon. >> i think they need to know that if they take that step, that they're going to get

stopped. >> reporter: iranians have stepped up their counteroffensive. a top commander of iran's revolutionary guard said the leadership has decided to have the closure of the strait of hormuz if new u.s. restrictions on iran's oil trade go into effect. it's a threat on which iran could make good even if briefly says joint chiefs chairman general martin dempsey-- dempsey. >> they've invested in capabilities which could, in fact, for a per of time block the strait of hormuz. we have invested in capabilities to ensure if that happens we can defeat that. >> reporter: but mideast scholar michael adler does not think military action is inevitable. >> the whole purpose of the diplomacy has been to avoid facing that horrible choice of living with iran with the bomb or bombing iran. the sanctions are designed to cause iran so much economic pain that they have no choice but to strike a deal on the nuclear program.

>> reporter: at the same time iran is escalating its rhetoric, it is also suggesting that it may be willing to sit down and talk. but u.s. officials continue to believe that the only way to get iran to abandon its nuclear program, short of military action, is to squeeze its economy so tightly that it will have no choice. jeff. >> bill plante from the white house. bill, thank you. >> we turn now to campaign 2012 and the aftermath of this weekend's debate doubleheader. with just two days to go before the new hampshire primary, republican voters have had their last chance to see the candidates all up on stage together. jan crawford is in manchester tonight. jan, good evening. >> well, good evening, jeff t was an incredible two debates over 12 hours all on the weekend before the nation's first primary. now this was supposed to be an all-out war against mitt romney. but in the first debate emerged pretty unscathed. this morning, though, he took some hits. with mitt romney holding i commanding lead, challengers

did their best to make him a punching bag. >> can we drop a little bit of the piosbalon, y, the fact is you ran in '94 and lost that you weren't in the senate with rick santorum. >> if his record was so great as governor of massachusetts why didn't you run for re-election. >> reporter: romney tried to block the blows and delivered a jab of his own at santorum and gingrich as career politicians. >> i long for a day when instead of having people who go to washington for 20 and 30 years, who get elected and then when they lose office they stay there and make money as lobbyists or connecting to businesses, i think it stinks. >> reporter: today's debate was entirely different than the one just 12 hours earlier when romney was largely untouched and the anti-romney candidates skirmished for second place. >> the most devastating attack was when ron paul slammed newt gingrich as a chicken hawk who sent young men and women off to war having never served in the military. >> when i was drafted i was married and had two kids and

i went. >> reporter: today the anti-romneys also got slots in at one another like when surging rick santorum hit hard at paul on foreign policy. >> the problem with congressman paul is all the things that republicans like about him, you can't accomplish. and all the things they are worried about he will do day one. and that is the problem. >> reporter: now this was the first debate for santorum to be center stage right there with romney after his strong showing in iowa. he really held his own as the leading alternative to romney even though romney took those punches, though, there was no knockouts. jeff, he is still the front-runner. >> jan crawford on the campaign trail, jan, thank you. also on the campaign trail is our political director john dickerson, john joins us from new hampshire as well. john, so from your perspective any serious damage to mitt romney in this double header? >> well there were were some tough attacks in that second debate. byous ba loany is the kind of frank language we don't normally get there a campaign debate and the charge is the one that has always haunted romney, that he is pretending to be something that he is not.

the largest version of that is that he is pretending to be a true conservative. but romney has been able to weather that charge before. he still seems positioned to do well here in new hampshire. and he has the money and organization to go forward. so he may have taken some nicks but a win here in new hampshire will do a lot to overcome any new damage. >> so he takes these nicks and all the other candidates seem to perform reasonably well in these debates which also then even helps romney, correct? >> that's right. all of the romney competitors had strong moments, jeff. even including jon huntsman and rick perry who in previous debates have either disappeared or bungled. for a voter looking for an alternative to mitt romney there are several alternatives and that's what helps romney. his opposition is fractured. if he keeps doing well enough to get a strong share of the vote and his competitors keep splitting, he has the money to outlast his rivals. >> john dickerson, thank you very much. >> thanks, jeff. >> later, 30 candles for the

future queen, kate middleton. the bungee jump that brought one tourist close to death, and next, the people of tucson reflect one year later. those stories when the "cbs evening news" continues.

since jarrod loughner in tucson, arizona, killed six people and wounded 13 others including congresswoman gabriele giffords. last night she enjoyed a first note out in her hometown accompanied by her mother. and today she received a call from president obama who called her recovery incredible. ben tracey reports tucson also is still healing. >> reporter: aaron buchanan and her 11-year-old son kenneth were busy hang up bells around tucson this morning. symbols of hope. >> hope, faith, hopefully it's not going to happen again. >> reporter: they headed to

the safeway grocery store, the site of the shooting so at 10:11, the moment of the shooting they and so many in tucson could remember. >> a lot of healing has happened here in the last year. and so it was just nice to have that healing come full circle. >> reporter: it's a far different sound from one year ago. >> there are multiple people shot. >> okay. >> oh my god. >> when in 16 seconds, 31 bullet --: -- bulleted shattered a sunny morning. at the grocery store a memorial stands, a boulder symbolizing tucson's unbreakable spirit surrounded by six smaller rocks for those who were lost. congresswoman giffords who was shot in the head has been recovering in houston but she and husband mark kelley are back in tucson this weekend return together safeway for the first time since the shooting dedicating a memorial in her office to her young aide gain zimmerman who was killed in the shooting. and visiting a trail head named in his honor.

mark kelly says they've received nearly 30,000 get well cards this year, most of them from tucson. >> does that help keep you going? >> oh, absolutely. >> in some way that gives you some strength. >> absolutely, to know there are all these people out there praying for you, and that have you in their thoughts and are thinking about you and they want you to recover. it keeps you motivated. ♪ ♪ . >> reporter: and through many moments this weekend this city is moving forward too. even if there is one question about the tragedy that this 11-year-old will never be able to answer. >> wow, why would anybody do that? >> reporter: that's a question many people will likely be asking here tonight at the university of arizona where a candlelight vigil is soon to begin. congresswoman giffords and her husband mark kelly are expected to attend. ben tracy, cbs news, tucson. >> stay with us, we'll be right back.

today-- deadly crackdown on civilians and wants more monitors let into the country but anti-government protestors now want help from the u.n. saying the arab league has failed to stop the escalading violence. in iraq over 80 people have been killed in a surge of sectarian violence as the withdrawal of u.s. troops. as elizabeth palmer reports tonight, the insurgents are making no exceptions. >> reporter: the baghdad school for the arts is a calm refuge from the busy broken city all around. outside at break time

students play the same games as kids all over the world. until the bell rings and it's back to work. a full academic program with extra arts instructions for these talented students. but this ballet teacher in the same school where she was once a student is worried. >> nobody respects the policeman, nobody respects the-- nobody respects anything. so to me this is the most worst thing in baghdad, in iraq. >> do you feel safe. >> no. >> reporter: these children are rehearsing their end of semester concert. all of them would like some kind of future in the arts. a future that is now in doubt after a series of threats against artists and intellectuals. including the cold-blooded shooting in september of the

activist and writer hadi al mahdi who helped organize regular friday demonstrations for freedom of expression in central baghdad. there is no evidence that the intimidation is a policy or a campaign or stated by the government. but it has got all artists, poets, writers, dancers and musicians spooked. al tahy received her last death threat two years but she's still nervous. >> i don't know what will happen to us, to the artists. >> reporter: do you think it's because there is a strong religious fundamentalist influence in the government. >> yes, yes. >> reporter: radical islamists condemn many art forms but this, dance that celebrates the human and especially the female form is completely unacceptable. at the ent rance to the school, there is tight security. visitors and parents patted down and screened. in most countries, critics attack the arts.

here it's more likely to be terrorists. elizabeth palmer, cbs news, baghdad. >> more than a million children returned to school in libya this weekend. it is the first time classes have been held there since the revolt to oust moammar qaddafi began nine months ago. students are learning a new national anthem and studying from textbooks revised to eliminate chapters that glorified qaddafi. we saw some incredible video today out of africa if he world famous victoria falls along the zimbabwe zambian border. an australian tourist went bungee jumping only the bungee cord didn't work. it billed as 360 feet of pure adrenaline but it tured into terror for aaron langworthy. take a look at her bungee cord snaps. 60 feet above the water. >> it went black. straightaway and i felt like

hi been slapped all over. >> reporter: she was alive but the currents as you can see began to drag her toward the rapids. water also full of crocodiles. her legs still tied, the 22-year-old australian said she had to dive down to free her ropes from the rocks. >> when i was first pulled out of the water they put me on my back and so all the water that i had inhaled meant that i couldn't breathe so i made them roll me on to my side and that is when i started coughing out water and blood. >> her body is bruised and beaten. langworthy made her recovery at a south african hospital. the zambian information ministry says up until now, 50,000 tourists were making that jump every year. still ahead, campaign 2012, which way will the youth vote go? that story is next

>> some of the republican presidential candidates are particularly betting on young voters to help them win in new hampshire. the lastest poll shows paul, romney and huntsman have the most appeal but with 25% still undecided there is room for change. here's chip reid. >> reporter: we took a great-- we took a great state and we took it to number one in job creation in this country. >> former utah governor jon huntsman's economic plan gets rave reviews from republican marco, a junior at st.-- college in manchester. >> jon huntsman has a bigger plan to reign in the big banks and get the banks lending again. >> looking hard at former governor mitt romney but finds him inconsistent and backtracking from his own health reform law in massachusetts. >> he is a flip-flopper.

he says one thing 1 week and another week he changes. he changes his position. >> reporter: but greg perkins a 27 year old independent who was recently laidoff from wal-mart believes romney's business background will help him create jobs. >> i got to look for a work and it's hard now. >> reporter: four years ago perkins supported barack obama like 61% of new hampshire voters under 30. >> i was on the obama bandwagon, you know, when that rolled around. i will tell you what, point-blank, it was a disappointment. i mean everything that was supposed to happen with the economy being turned around and the change we needed, what change. >> reporter: no discussion of young voters would be complete without a discussion of ron paul. virtually every event he does las an overflow crowd of young voters. he won the youth vote in iowa and is expected to dot same thing here in new hampshire. >> it's time to try something new. and we need to get-- if it's radical maybe that is what we need right now. >> reporter: zachary, koehler a sophomore likes paul's idea tow eliminate five cabinet departments,

slash defense spending and bring the troops home. >> i love his foreign policy because i have the saying that if you stick your nose into other people's business enough, you are going to get punched eventually. >> personal liberty and economic liberty are one and the same. >> reporter: it's paul's spirited defense of civil liberties that inspire 24-year-old sash a wood. >> i love personal liberties. i love freedom. i love unopposing, uno proceeds -- oppressing governments. >> reporter: years ago a number of new hampshire voters under age 30 turned out for the primary. this year they are once again poised to play a major role. chip reid, cbs news, nashua, new hampshire. >> whatever the ultimate choice of the young, one campaign tradition is already getting old. at least at one new hampshire eatery. colbie's breakfast and lunch in portsmouth has posted the forbidding sign, no politician, no exception. the restaurant's owner says the parade of candidates meeting and greeting his customers interferes with business. still to come on tonight's "cbs evening news", where's

the baby? the question on many british lips as kate middleton is about to turn 30.

>> finally this evening a pair 6 newsworthy birthdays starting with stephen hawking, the british physicist who turned 70 today. hawking was diagnosed with lou gehrig's disease in 1963 when he was only 21. he sent well-wishers an audio greeting. >> so remember to look up at the stars and not down at your feet. be curious. a there is always something you can do and succeed at. it matters that you don't just give up. >> and looking ahead, kate middleton turns 30 tomorrow. a big birthday for just about anyone. all the more so for a newly minted royal with one very large responsibility yet to fulfill. mark phillips has details of the low-key celebration.

>> reporter: the palace announced that kate, now katherine duchess of cambridge, wasn't going to have a big 30th birthday party but this film premier in london on the eve of the event would have to do. she and prince william were bigger celebrities than anybody in the movie. in fact, they have become top of the a-list celebrities where ever they've gone since the big wedding last april. if birthdays are a time for taking stock, the marks for kate are in and they couldn't be higher. >> she hasn't put a foot wrong. and in that regard i think the royal family and particularly the queen will be delighted with how she has played it so far. she's really been a natural royal. she's very comfortable in the role, very comfortable by william's side. >> reporter: it's been just eight months since the wedding and in that time sometimes it's been hard to tell who was born and bred for the job, william or kate. but the more popular kate becomes, the more she invites comparison with the previous holder of the royal glamorous cover girl job,

william's lathe mother princess dianea. >> i don't think there is anything wrong with making comparisons. that said, they are two different woman and kate is of a different era and time. you have to remember that diana was much, much younger when she married into the royal family, much more naive. not as well educated. >> reporter: but there's one royal role kate has yet to to fulfill, making royal babies. one popular theory is that the couple are waiting until after the queen's diamond jubilee celebrating 60 years on the throne later this year. it would make a nice anniversary present. mark phillips, cbs news, london. >> that is the "cbs evening news" tonight. later on cbs, 60 minutes. and we hope will you watching first thing tomorrow for 9 premier of cbs this morning with charlie rose, gayle king and erica hill. i'm jeff glor, cbs news in new york. scott pelley will report from new hampshire tomorrow. good night. captioning sponsored by cbs captioned by media access group at wgbh access.wgbh.org

fuse. . more than a dozen fires in one city overnight. how police are planning to catch whoever lit the fuse. san francisco's top cop officially sworn in. his response to allegations he assaulted his wife. and a big show of support for the east bay. why the "new york times" says oakland is a can't-miss global destination. cbs 5 eyewitness news is next.