and levi johnston is off again. bristol tells us what happened. and we learn the advice she got from her mom. and good morning, everyone. we're following really conflicting reports that are coming out of iran. several news agencies say iranian president mahmoud ahmadinejad was attacked in western iran. reports of a homemade bomb hitting a vehicle in his convoy that was carrying presidential staff. >> the president was not hurt. he appeared live on iranian television. he made no mention of the attack. one person has been arrested. jim sciutto's been following the events. has the latest from london. jim, one of the odd twists here. yesterday, ahmadinejad predicted there would be an attempt on his life. >> reporter: absolutely, george. that's one thing that's adding confusion to this story. the president saying earlier this week, quote, silly zionists who hire assassins to assassinate me. a government source said a homemade explosive device was thrown at his convoy, causing injuries. but later, the government is denying it. the president's office saying to abc news, there was no bomb. no attack at all. and that this was, in fact, fireworks, part of celebrations welcoming him to the city. as you mentioned, he said this speech to a crowded sports stadium. and made no mention of the attack at all. inside iran, though, i've spoken to several people there. there's confusion and real doubt about the story. some dissidents i've spoken to say this is a government ruse to justify a further crackdown. >> let me follow up on that. this comes as western states are cracking down on iran. tightening screws of the sanctions. and u.s. officials i've spoke with say they see evidence that this is causing fissures in the society. is this a sign that it's working? >> reporter: it's possible. the dissident movement in iran has been struggling to keep the protest movement alive. the strikes and the bizarres that you mentioned is one recent size they can organize something. but there's been other, more worrisome things, as well. deadly bombings in the south and west of the country, which iran and president ahmadinejad have blamed on outside interests. blamed on the west. i think you're seeing here so much confusion, so much doubt and distrust of the government, as well, which is another sign of the tension inside the country. >> okay. jim sciutto, thanks very much. robin? george, our other major story this morning. it's day 107 of the crisis in the gulf. and it appears the end is finally here. the end of the oil spilling into the gulf, that is. bp officials executed that static kill on the broken well. and they say it is working. jeffrey kofman is in buras, louisiana, with the latest on that. good morning, jeffrey. >> reporter: and good morning, to you, robin. this is really big news here. that well is dead. it took them much less time, for once, something went ahead of schedule and as planned. just eight hours to fill that entire two-mile-plus pipe with heavy drill mud. there's no way we'll see oil coming out of that pipe again. engineers outside of bp tell us, this is the official kill of the well. it's not the end of it, though. they still will want to replace the mud with cement, from the top to the bottom. they insist they're going to finish the relief well, just 100 feet from its target, to cement around the outside. make no mistake, robin. this is a big day. after 107 days, that well that's caused so much grief here, is finally dead. >> all right, jeffrey. thank you very much. joining us, now, from washington, is carol browner, one of the top administration officials dealing with the gulf disaster. thank you so much for joining us this morning. we want to hear from you. what is the latest information you are hearing? here is day 107. is it finally over? >> it's very close in terms of containing the well. we're going to continue to work with the gulf coast communities, with the people of the gulf coast, for a long time to come. we want to make sure that everything is put back together and that their claims are honored. but i think the good news is that the vast majority of the oil appears to be gone. that's what the initial assessment of our scientist is telling us. the containment, the burning, the skimming, it worked. the relief wells. that is the way to permanently kill, kill, kill this, as we say. and those should be -- we think it could be done in as little as two weeks. we did get some good information overnight. the static kill, pushing the mud down from the top, did help to contain the well even further. >> so, do you expect any more oil to be released from this well? >> at this point, we do not. and as our scientists are saying, the vast majority of the oil has either been cleaned, skimmed or contained. what we'll see coming ashore, there will continue to be tar balls. there may be some sheen. but it should be significantly less than we saw at the height. we'll make sure that is cleaned up as quickly as possible. >> very encouraging, as you're saying, what the scientists are saying, that roughly three-quarters of the oil is gone. but for those people in the gulf, ms. browner, who are concerned about any oil being there, how confident are you about the current numbers and the accuracy of them? >> this is an initial assessment by our scientists in the government and outside the government. we think it's important to make this available to the public. that's what we'll be doing today. bedo feel this is an important turning point. the fact that the oil is being contained. that the well and the cap is working. that the mud work that we can see of the relief well, coming into its final stages. and that the amount of oil that has already been collected, if you will, the vast majority's been collected. i think this is encouraging news. >> as you said, the vast majority has been captured, which is fantastic. but do you have an idea of the amount that is still there in the gulf? >> well, the scientists are telling us about 25% was not captured or evaporated or taken care of by mother nature. so, that will continue to weather. mother nature will continue to break it down. but some of it may come onshore, as weathered tar balls. and those will be cleaned up. they can be cleaned up. and we will make sure they are cleaned up. >> i know it's another busy day for you. you're heading to the sunshine state. carol browner, we appreciate your time this morning. >> thank you. we're going to turn to the political battle over illegal immigration. so divisive, it's taken a new turn. some republicans want to review the constitution. specifically the portion of the 14th amendment that says any baby born on american soil is an american citizen. senior congressional hey, jon. >> repo the immigrtion wars. redein takome in the latest effort against illegal immigrants sneaking across the border, some republican senators are now saying their children should not be considered american citizens, even if they are born here. >> to have a child in america, they cross the border. they go to the emergency room. have a child. and that child's automatically an american citizen. that shouldn't be the case. >> it's a rather unseemly business. and i think we should have some hearings and take a look at it. >> reporter: one of the first to raise the issue, tea party candidate, rand paul, on of all places, russian tv. >> we're the only place that allows people to come in illegally. have a baby. and that baby becomes a citizen. i think that should stop also. >> reporter: stopping would would require changing the constitution, which says if you are born here, you're an american. it's the 14th amendment. all persons born or naturalized in the united states and subject to the jurisdiction thereof, are citizens of the united states. senate democrats accuse republicans of pandering to anti-immigration extremists. >> i think it is an issue that deserves discussion. i think the way it's being presented now is 100% political. >> reporter: and the white house says that republicans are trying to raise this issue now for purely political reasons, as well. and in fact, george, while you're likely to hear more of this on the campaign trail, nobody expects any actual changes in the law anytime soon. that would first require a change in the constitution. for more on this, we have one of america's most prominent voices on the subject of illegal immigration, lou dobbs. welcome back, lou. >> thank you, george. >> i have to begin by showing you something you may not have seen. you've been one of the toughest voices on illegal immigration in years. >> did you say clearest? >> toughest. i'll go clearest. you've taken heat from jon stewart. but not this week. take a look. >> i wish there was a voice of reason out there. someone who could see this issue clearly. >> i have to insist that we recognize those anchor babies as citizen of this country. >> lou dobbs thinks your immigration measure is too draconian. lou dobbs, who has spent years of his life, trying to get dora the explorer deported. >> he's doing that because you disagree with senators john mccain, lindsey graham, saying let's look at the constitution. >> i don't have a problem with looking at any right and examining it. so the purpose is to bolster the public's understanding and knowledge of those rights, which i think is clearly needed here. the idea of denying citizenship to those who are permitted citizenship under the citizenship clause of the 14th amendment. i'm a law and order guy. i want our borders secured. i want the laws enforced. i want the american people represented and all their interests. it's not in the interest of the american people, in my judgment, at least, to roll back laws. because the result may be inconvenient to some and their political views. including mine, frankly. i don't think that that's the way to proceed. >> let me play devil's advocate for a second. those making the argument say, you have people coming here for the purpose of having babies. dropping babies here. if you look at other democracies, england, france, they don't have birthright citizenship. >> it's the only -- it's one of the reason i embrace hearings. we're the only nation on earth that gives birthright citizenship. and 400,000 anchor babies have estimated to have born in this country last year. it's an immense problem. but the way to deal with that problem is rationally, through public discussion, through the american way. and the middle class will be represented. those who aspire to it. including, by the way, those who are born into their citizenship in this country, of illegal immigrant parents. >> i think one of the things that surprised a lot of people here is one of the first voices to call for this, lindsey graham. someone who has been advocating a pathway to citizenship for illegal immigrants. a sign of great frustration on all sides of this issue. >> i think you're exactly right, george. senator graham, senator kyl of arizona. two moderates. men who worked very hard in good faith with the factions, seeking unconditional amnesty, open borders. they're so frustrated by being met with any resistance to compromise. i believe that all of those groups have overstepped. those on the left, they go as chamber of commerce, you name the group. these are interest groups demanding from the left the whole loaf. i'm among those who have been trying to come up with an intelligent compromise. they're going to defeat the very interest of the people they purport to represent. that's the illegal immigrant. our economics are working against them. they have moved to the wrong side of history on this issue. this is a time for reason. this is a time for moderation and proportion. and they're exhibiting not any inclination whatsoever to move in that direction. >> we only have about ten seconds left. any possibility of common ground in the next year? >> not unless those groups understand they're not going to demand citizenship. and we're going to move forward is a matter of national interest, not special interest. >> okay. lou dobbs, thanks very much. >> great to be with you, george. juju chang has the rest of the news. >> good morning. we're learning more about the man accused of gunning down eight-his co-workers at a connecticut beer distributor, including details of what omar thornton told his mother on the phone moments after the bloodbath. our clarissa ward is in manchester, connecticut. good morning, clarisa. >> reporter: good morning, juju. a clearer picture is starting to emerge of yesterday's horrifying events. one eyewitness who was shot twice told the associated press that the shooter remained as cold as ice, as he went on his killing rampage. the mayhem began just after 7:00 a.m. omar thornton was leaving a disciplinary hearing over video showing him stealing beer. he was given a choice, resign or be fired. armed with a small handgun, he chose a more violent option. >> he's shooting. he's shooting. call 911. >> reporter: when the shooting spree was over, thornton called his mother. i killed the five racists that was there bothering me, he said. then, debating whether to kill himself, he told his mom, i love you very much. i want you to take care of yourself. i want you to stop smoking. police arrived on the scene. and he turned the gun on himself. the cops are knocking on the door, he said, according to his uncle. i'm not going to jail. >> something snapped inside his head. >> reporter: thornton had at least five guns registered to him. on his facebook page, he listed hoffman's gun center as one of his interest. one of two african-american employees, he reportedly said he was discriminated against at work. >> he claimed he was being racially harassed. they had a hangman noose hanging from the bathroom. >> reporter: it's an allegation those close to the company fiercely deny. >> the first time i heard it was today. i don't think this was the issue. >> reporter: and one more detail. the killer apparently stashed the weapon and the ammo in his lunchbox, in order to smuggle them into work. juju? >> clarisa word with the latest from connecticut. thanks. federal agents are corning that computer hackers have launched an assault on power plants and other industries. there's a malicious code designed to take over the systems at industrial plants. the homeland security department is taking the threat so seriously, it's deployed special response teams. finally, a light show like you've never seen. an explosion on the sun sent a rare solar tsunami towards earth, lighting up the night sky with these colors that will be visible tonight. all the "m" states. michigan. minnesota. >> looks like one of the fissures you used to play with. >> beautiful. >> gorgeous. thank you, juju. let's go to sam and the weather. >> we're going to deal with the heat. good morning. we have another day of it. these are the records that were set during the day yesterday. ten major highs in major cities. most of them in triple-digit areas. little rock, 107 degrees. from wichita, to oklahoma city. you have to get a little east of you. tulsa's big involved in this. dallas, as well. memphis is going to be a big part of it. tomorrow, the front will drop to the south. that means half of the area will not be in the big heat. that could mean big storms. chicagoland, you have giant storms rolling through the area for the second day in a row. 21,000 lightning strikes in the last hour with the storms near chicago. all of america's weather in the next half hour. robin? >> thank you, sam. it is official again. bristol palin says her just-announced reengagement to levi johnston is off. bristol says that she, quote, got played, by the father of her young son. neal karlinsky has all the details on the latest chapter in this saga. >> reporter: the engagement fell apart so fast, that the very day this magazine cover announcement hit the stands, the couple was already splitting again. bristol palin tells "people" magazine, that levi johnston announced that very day he may have fathered a child with another teenage girl. and she says, he showed no remorse, as she broke down, heartbroken and humiliated. >> she feels like, you know, he's not in it for her. he's in it for fame. he's in it for attention. i think that's one of the big points that is causing this breakup. >> reporter: today, in a statement to abc news, bristol says she expected levi to be more like her dad. to work his butt off. and always put his family first. the relationship has been a real-life soap opera since the beginning. pregnant as teens. engaged and announced to the world at the 2008 republican national convention. then, quietly broken up months later. turn the calendar a year, and they were back in the limelight, famously engaged again. magazine photo shoot and all. once again, there would be no wedding. just a bitter bride-to-be. and an unpredictable almost groom. after the breakup, bristol said that levi sent her a text message. not to see if she was doing okay. but to ask if she wanted to do a reality show with him. it was enough for sarah palin to quote ronald reagan himself. writing in a statement that her daughter will know in the future to -- >> trust by verify. >> reporter: bristol told "good morning america" earlier this year, that being a single mother isn't easy. >> all of us are single moms. all of us don't have that husband figure or someone that's helping us through everyday. we're all single moms, doing it by ourselves. >> reporter: for "good morning america," neal karlinsky, abc news, seattle. >> think we'll hear a sigh of relief from sarah and todd palin. >> time to raise that baby with privacy. coming up, thinking quick on her feet. in the most bizarre home invasion yet, a woman tide up by robbers used her toes to type out a plea for help. she joins us with her story. and the supermodel sparking the mother of all debates. why gisele says nursing should be required by law for six months for everyone. you see it? 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