hiding in abbottabad. they apparently set up a free vaccination campaign offering free vaccinations, free polio drops of the children and residents of abbottabad where this bin laden compound was located. according to the guardian paper, he had hired two nurses. these nurses were going home to home. the plan was to find bin laden's kids, get to them and somehow extract some blood or perhaps use the syringe from one of the vaccinations and match their dna samples with samples of bin laden's sister's dna, bin laden's sister passing away last year in boston, massachusetts. we haven't been able to verify if indeed these two nurses made it into the bin laden compound. we did track down one of them several hours ago, spoke to her on the phone and she repeatedly said she can't talk about this matter. we have also talked to a number of residents of abbottabad and they tell us that indeed, just days before the bin laden raid in may, two nurses were going around house to house offering vaccinations. we should also note a u.s. official has told the guardian paper this plot was in place but it didn't succeed in getting the necessary dna samples, randi. so a rare glimpse of what the cia was doing in the days leading up to this raid on the bin laden compound. >> just to be clear, they wanted to get this dna to compare it to the sister and what, that would have told them this was indeed bin laden's compound? >> reporter: they could have used it for two things. they could have verified that indeed, bin laden was there and perhaps after they had gotten him, they could have verified that indeed, this was bin laden. it's not clear exactly what they wanted to do with dna samples but what is clear is that they went to great lengths to get these nurses, to set up these nurses with this doctor to somehow gain access to the bin laden compound and get these dna samples. >> reza, do you have any idea where this doctor is, why he's being held? has he been charged with anything? how is he being treated? >> reporter: we don't know where he is. we just know that he's in custody. it's not clear if he's going to be charged with a crime, not clear why he's been picked up. what we do know is pakistan has said they haven't been happy with how this operation was conducted, this unilateral operation by the u.s. they call it a violation of their sovereignty. there could be a number of reasons why they have taken him into custody. could be payback against washington, it could be payback against these pakistanis that allegedly helped the cia. another plausible reason could be they want to find out how the cia established a very intricate intelligence network here in pakistan on their soil behind the government's back, randi. >> this may say quite a bit, really, about u.s./pakistani relationships. >> reporter: it certainly does. at this point, those relationships are not good and this is an indication that at least when it comes to the bin laden operation and some intelligence gathering, these are two countries that despite advertising themselves as partners, they're not on the same page. certainly, in fairness to pakistan, we should note that if american citizen was helping pakistani spy services on american soil, he probably would be in custody, too. it is unusual circumstances but certainly not a shocker that this pakistani is being questioned and held in custody. >> reza sayah for us in pakistan, thank you. our sound effect today is the latest public outrage over private information that found its way into rupert murdoch's newspapers in britain. let me say for the record that journalists are supposed to dig up information and just because somebody considers something private doesn't necessarily mean it's not newsworthy. but the murdoch scandal centers on alleged illegal phone hacks and bribes to police to get phone numbers, voice mails and documents from literally thousands of celebrities, politicians, members of the royal family, even murder victims. it's cnn's in-depth story of the week. today, former british prime minister gordon brown says murdoch papers got hold of his family's bank records. here's what brown told the bbc. >> i think what happened pretty early on in government is that the "sunday times" appeared to have got access to my building society account, they got access to my legal files, there's some question mark about what happened to other files, documentation, tax and everything else, but i'm shocked, i'm genuinely shocked to find that this happened because of their links with criminals. >> brown's predecessor reflected on the murdoch scandal and media transgressions in general with cnn's wolf blitzer. >> what is important to realize this is not about one group of newspapers or one part of the media or one type of procedure, whether in this case hacking. it's about a whole range of things that need to be looked at so that we understand what's acceptable and what isn't acceptable because in a way, what i was trying to say to you earlier is i think as the result of this, over the years, you tolerated what in a sense is intolerable. because, look, when you're the prime minister, you're running a country, you can't go out there every day and start complaining about the media. the public would say that's fine but get on with your job. >> back in london, a parliamentary committee has summoned murdoch, his son james and head of their news international group to answer questions a week from today. all three are expected to appear. now checking other top stories that we're following. republican presidential candidate ron paul says he won't run for re-election to the house next year. paul is a 12-term congressman from texas. paul's senior advisor says paul will instead focus all his efforts on winning the republican presidential nomination. it's paul's third attempt to win the white house. in afghanistan, the powerful half brother of afghan president hamid karzai was assassinated today at his home in the southern city of kandahar. officials say he was killed by a trusted guard. the suspect was then killed by other guards. the taliban says the shooter was working for them. ahmed wali karzai was accused by the u.s. and local afghans of being involved in the drug trade and other illegal activities. president karzai spoke to reporters about two hours after the shooting, saying only that quote, this is the life of the afghan people, this sorrow is in every afghan home. high above earth, a final walk in space. these are live pictures that we are bringing to all of you. two crew members of the international space station, you see it here, venturing out on the last space walk of nasa's space shuttle era. absolutely breathtaking. the two floated over the yucatan peninsula. take a look at these live pictures. their job today is to recover a broken pump and stow it in the cargo bay of shuttle "atlantis" which docked with the space station on sunday. the space walk was scheduled to last about six hours. the "atlantis" mission is the last of the 30-year shuttle program. "atlantis" due to return to earth on july 21st. on the afghan battlefield, it was an act above and beyond the call of duty. army ranger sergeant first class leroy petrie lost his right arm below the elbow while tossing an enemy grenada way from his fellow soldiers. for that act of bravery, president obama will present him with the medal of honor, the country's highest military award. he will become the second living recipient of the medal of honor from the iraq and afghan wars. the 31-year-old is the father of four children and has served two tours of duty in iraq, six in afghanistan. sergeant petrie, his wife and other family members will join president obama at the white house at the top of the hour for the medal of honor ceremony and we will of course bring that to you live when it happens. meantime, coming up next, one of the biggest school districts in the country, once scoring high marks and high praise, turns out it was all a big lie. cheating, not by students but by teachers and principals. the one man charged with cleaning it all up joins me next. ok. 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[ horn honks ] at liberty mutual, we know how much you count on your car and how much the people in your life count on you. that's why we offer accident forgiveness, man: good job. where your price won't increase due to your first accident. we also offer a hassle-free lifetime repair guarantee, where the repairs made on your car are guaranteed for life or they're on us. these are just two of the valuable features you can expect from liberty mutual. plus, when you insure both your home and car with us, it could save you time and money. at liberty mutual, we help you move on with your life. so get the insurance responsible drivers like you deserve. looks really good. call us at... or visit your local liberty mutual office, where an agent can help you find the policy that's right for you. liberty mutual insurance. responsibility. what's your policy? this just in to cnn. president obama has made some very interesting comments about social security during an interview with cbs evening news anchor scott pelley. we want to bring you a couple of those. in the meantime, we want to tell you exactly what he said. he said that he cannot guarantee, this is the president's words, cannot guarantee that retirees will receive their social security checks august 3rd if democrats and republicans in washington do not reach an agreement on reducing the deficit in the coming weeks. the exact quote apparently coming from cbs is i cannot guarantee that those checks go out on august 3rd if we haven't resolved this issue, because there may simply not be the money in the coffers to do it. that is a quote from president obama coming to us from cbs. we'll have the tape for you as soon as we can get it in. we wanted you to have that information of course first. meanwhile, if it is an act that defied the basic principles of education, an act that failed thousands of students and shamed an entire city school district. in the wake of the atlanta public school cheating scandal, interim superintendent has taken a first step to right the alleged wrongs of nearly 200 educators. last night, davis replaced four area superintendents and one principal, nearly a week after an investigation revealed that dozens of atlanta public school educators had falsified standardized tests. also at the meeting, the former school board chairman offered his tearful resignation. >> i failed to protect thousands of children. children who come from homes like mine. >> someone who wasn't at last night's meeting, former superintendent beverly hall, who many blame for creating the environment of cheating and cover-up. instead, hall is vacationing in hawaii and when an atlanta tv reporter caught up with her, this is what happened. >> there is no escape for atlanta's former deputy superintendent either. a texas school board decided last night to place kathy augustine on paid leave on her first day on the job. you see augustine was just hired as the superintendent of a dallas area school district. i know this is a lot to keep up with as this scandal unravels. so let's do this. let's bring in just a little bit here to talk about the fallout, let's bring in the atlanta public schools interim superintendent, errol davis joining us in studio. last night you took a first step but before we get to that, and your plans to help right this wrong, i want to get your take on what happened in your district. >> well, what happened is very simple. people failed children, they cheated, and we can't allow that to happen. we can't allow anyone who was involved with that to remain in our system. >> we're talking nearly 200 educators here that may have been involved. how will you decide who to keep, who to terminate? >> again, the names are already out in public. they were named by the special investigator and we are in the process of removing those who have been implicated. they will, of course, be given all of the due process rights that they deserve, but they will not be appearing in front of our children this fall. >> in terms of the charges, what kind of criminal charges might we be talking about? >> again, the criminal charges will be up to the local district attorneys and they will determine the nature and extent of any criminal violations. that's not up to us. the people will also be referred to the professional standards commission to determine whether they will in fact be allowed to keep their credentials or to teach elsewhere. >> you said the names are out there. is there a possibility we might see more names, that there are more people involved than we even know about right now? >> i think it is a distinct possibility as we speak with each one, as we go through each case, they may in fact implicate others and we will take the appropriate actions as necessary against those as well. >> you have said, i'm quoting you here, a focus on performance does not cause people to cheat. were these teachers and these administrators under pressure, could that have possibly led to this? >> well, i've worked all my life under pressure. i've worked all my life to achieve goals and objectives, and i never thought about cheating. i think what is missing is an understanding that the repercussions and the consequences for cheating will always be and should always be far worse than they would be for missing a target or missing a goal. >> you may not want to point a finger here but i'm going to ask you to. who do you blame? >> again, i believe that all failures in any industry are leadership failures. i never blame workers when things don't work. it's leadership's responsibility to lead and leadership is accountable for every outcome that takes place on their watch. >> two of the elementary schools with new principals begin classes tomorrow. the rest, august 8th. is there any plan in place, what can we expect from the first day of school now for these kids? how are they going to deal with this? >> again, the people on the ground are much better than i and much more adept and equipped to deal with children, but we do have two new principals ready to go and two of the three schools, and i spoke with the staffs of each of the schools this morning. they are enthused, they are ready to go. they are angry and they are embarrassed that they have been tainted by a very broad brush when in fact, we have thousands of really excellent teachers who are turning out excellent outcomes. >> what will be the message to the students? will the new principals and teachers sit down with them and explain to them what happened and how it was so wrong, and help them understand how it can't happen again? >> again, i will leave that to the principals. >> do you think they should? >> i think there certainly are lessons to be learned here. there are lessons to be taught and one of the lessons clearly is that cheating is not the way to accomplish any goal or objective. >> how do you fix this besides removing the people who may have been involved? i know you have an action plan. can you give us the highlights of it? >> there are no short-term fixes. we clearly have to make it clear what our values are. there's no particular strategies to put in place because i think culture trumps strategy always. we have to change the culture. it has to be a more open, more engaging -- i was very surprised this morning to find out that many of these employees had never seen the superintendent or met the superintendent, and i assured them that i was there. of course, i was there today but i'll be back tomorrow for the first day of school and i will visit all of the schools. >> how much pressure do you feel right now? >> oh, i don't feel any pressure. this is my third career. i think i'm becoming the patron saint but i am enjoying myself to the extent that one can in this environment. >> what are you hearing from parents? i'm sure that's not all enjoyable on that end. >> parents are rightfully angry and they should be, particularly those who had students who were cheated and where most teachers felt that perhaps those children were in fact too dumb to learn and that is not the case. we will identify those children and we will make the requisite investments to remediate the wrongs done against them. >> before i let you go, why do you think this happened? why do you think this went on? >> i don't know why it went on. clearly there were culture of fear and intimidation and people felt or a very few people felt that it was easier to cheat than to miss their goals and objectives. i just don't accept that that's the appropriate route and there are so many other teachers who have not made ethical compromises who are doing wonderful things on a daily basis. >> erroll davis, we appreciate you coming in. we know it's a tough time for the atlanta public school district. we certainly appreciate your time. >> thank you for having me. it's a tough time but we will get through it. >> i'm sure you will. we'll check back and make sure that you do. thank you. how much have you put away into your retirement? a new study may have you rethinking everything, next. the great recession was a punch in the gut to many of us, to our finances and future, but a new study shows it was a necessary jolt to shock americans out of their financial habits. most americans agree the last few years provided a wake-up call. it's changing how we spend, save, invest and retire. this is the reality in america. you're looking at the population growth over time. baby boomers are aging. about 1,000 adults 55 and older were polled. the study paints a very different financial reality than what you know about saving and has many rethinking retirement, actually. age wave ceo who conducted this study joins me from new york. glad you're with us. this study talks about the new american family. you say the average american family isn't this traditional nuclear family, but really looks more like a rubik's cube. can you explain that? >> sure. the family's no longer the "leave it to beaver" family or even the "simpson" family. it's become normal now to have three and four and even five, sometimes six generation families and like a rubik's cube, people are finding themselves more and more involved in support and friendship and connection with their brothers, their sisters, their moms, dads, in-laws. one of the more fascinating outcomes from this study was the realization that people over the age of 55, about half of them expect that they're going to have to step up and support a family member. as people have gotten through these tough times these last few years, and maybe they can't pay a house payment or put their child through college, they're turning to the bank of mom and dad. in fact, providing support from the elderly point of view to adult children was the number one expectation. >> as we talk about that, you mention that half of those polled expect they will have to bail out or at least help family members, 68% in fact expect to help out their adult children, 60% anticipate they will have to support their grandchildren. how do you think this changes the way that we should prepare and be retiring? should we plan to save more? do we need to do that at this point? >> there's no question that if we're going to live longer and longer lives, and we are, living to 80 or 90 or even 100 will become commonplace in our future, so there's three or four shifts we saw from the sun america retirement reset study. first, people are realizing it might be sensible to work a bit longer. if you shrink