prosecuted or at least there is some repercussions in terms of not only those who were involved, but those who allowed this to happen. >> when did you first know about the program officially called fast and furious, to the best of your knowledge, what date? >> i'm not sure of the exact date i probably heard about fast and furious for the first time over the last few weeks. >> reporter: targets include three atf agents. u.s. attorney supervised in phoenix. in washington acting atf director and assistant u.s. attorney general brewer are believed to have approved the program. at the attorney general holder and president obama claimed they knew nothing. some investigators believe otherwise. acting atf director melson