elizabeth palmer reports there ring london. >> reporter: the results were no carrier ring no carrier announced at a press conference in bangkok. in a three year long trial, 16,000 no carrier > volunteers were ring given either a no c placebo or a ring no carrier combination of ring no two old ri no carrier vaccine, neither of which proved effective in the no carpast but to surprise in ring two appeared to protect just over 30% of those no cvaccinated. >> this trial will be > ring recognized as a no carrier testament to ring thailand's ability to no carrier successfully execute a ring complicated vaccine no ctrial, the ring no carrier largest ever attempted, that ended with a no carrier ring no carrier credible conclusion and no carrier brought us one step closer to an hi vflt ring vaccine. no carrier >> reporter: in spite of ring billions of dollars spent on said indication and ri research the u.n. no carrier ring no carrier estimates that hiv inspects more than ring7,000 people a day worldwide. this announcement is not the magic bullet everyone is hoping for, but no carrier research

elizabeth palmer is in geneva tonight and, liz, with iran saying it won't cut back or back down on itslearato this meeting? >> they're working very hard to keep expectations low, although they have said negotiations could go more than one round. however, a senior administration official told me it's fair to expect that this is going extraordinarily difficult. >> couric: and what kind of signal do you think iranians are sending by the man that they've actually chosen to negotiate? i understand some u.s. officials are disappointed. >> he's a very stern individual, saeed jalili, he's the chief nuclear negotiator. but he's a religious conservative and very hard line. some diplomats are disappointed that the head of iran's energy... nuclear energy agency didn't come. he was educated at m.i.t., much more worldly, respected, and well liked. that would have sent a more conciliatory message. >> couric: and finally, liz, what in your view will constitute a successful meeting? >> if both parties retire to the respective capitals and talk with a date to meet again, that means that they have at lea

cbs news correspondent elizabeth palmer has the latest. >> reporter: this morning iran has actually hardened up its line on this newly disclosed site. it was under construction. they now say it's going to be put into operation. that's from the supreme leaders office which is squarely in line with the tone taken by iran's president. in new york, iran's president, mahmoud ahmadinejad, was on the offensive. >> translator: this is not anything secretly, it just doesn't mean that we must inform h. inform mr. obama's administration of every facility that we have. >> reporter: but iran didn't tell the iaea, the world's nuclear watch dog, until last monday. and only came clean then, say western intelligence agencies, because their secret had been discovered. it's time, said president obama, for iran to start dealing in good faith. >> iran's leaders must now choose. they can live up to their responses and achieve integration with the community of nations, or they will face increased pressure and isolation. >> reporter: iran has three main nuclear sites in operation. the biggest is in the t after the

britain, germany, france, and china on the other. >>> elizabeth palmer in london for us. thank you. >>> now for some perspective on iran's pursuit of nuclear weapon, we're joined in our washington bureau by martin, director of foreign policy at the brookings institution. good morning to you. >> reporter: good morning. >> now that we know that iran has been hiding certain aspects of its nuclear program, what can be done? that is the big question this morning. >> well, clearly president obama is going to try to engage with the iranians this coming thursday. negotiators will be sitting down and trying to get the iranians to see that it's in their interests to in the only come clean, but accept international safe guards and curbs on their program that would give the international community sufficient confidence that it's not going to take its fuel and divert it into nuclear bomb making material. if that doesn't work then i think president obama and british and french leaders have made clear that the nest step is what's called crippling sanctions. if that doesn't work then we'

elizabeth palmer reports. >> reporter: at 62 elton john says he's finally ready to become a dad. elton john was in the or fan imagine to donate a piano then later with his partner, david, holding l event v, he dropped the bombshell. >> after seeing lev today, i would love to adopt him. >> reporter: they were married in 2005 but a punishing concert schedule prevented elton john from considering adoption he says until this weekend. >> he has stolen my heart and he's stolen david's heart. and it would be wonderful if we could have a home. and i've changed my mind today. >> reporter: already critics are saying this is just another high profile adoption like madonna's and angelina jolie's. celebrities choosing or fans as designer trick kets. little is known about lev except that his mother is alive and that he has a brother in the orphanage. according to ukranian law, the brothers can't be split up, something elton john may not have considered he'd be getting not one instant son, but two. elizabeth palmer cbs news london. >>> "the insider" has all the insight into elton john and also

elizabeth palmer has the latest from london. good morning, liz. >> reporter: yes, the surprising and bound to be controversial results come from a very large field trial conducted in thailand and sponsored by various organizations including the u.s. army. the results show that an experimental vaccine reduced the hiv infection rate by 30% in a cross section of 16,000 volunteers. the thai people were given a combination of two older vaccine, neither of which have approach effective alone, but for some reason given together they appeared to offer some protection after the three year long trial. >> the largest ever attempted that ended with a credible conclusion and brought us one step closer to an hiv vaccine. >> reporter: in spite of billions of dollars spent on education and research, the u.n. estimates that hiv still inspects more than 7,000 people a day worldwide. the thai experimental vaccine isn't the magic bullet everyone is hoping for, but researchers say it is a big step in the right direction. so these results are encoura