he tells me this young mother, 30 years old could come and go as she wanted to. that everything, all these facts, simply aren't true. but investigators believe her. >> scott taylor, fabulous reporting. bizarre case, so thank you. now to capitol hill, where the house intelligence committee held a rare public hearing on the secret surveillance programs, those programs recently revealed by the nsa contractor edward snowden. for the first time, officials shared details about the surveillance the government conducts. general keith alexander, he's the chief of the nsa said the programs have helped thwart more than 50 potential terrorist plots around the globe since 9/11, including attacks here on the new york stock exchange and that city subway system. he called the surveillance limited and focused and also described what it does not do. >> does the nsa have the ability to listen to american's phone calls or read their e-mails under these two programs? >> no, we do not have that authority. >> does the technology exist to