now regarding operation fast and furious, the federal law enforcement program linked to putting guns in the hands of criminals. william la jeunesse,fox news correspondent on the fight on capitol hill to find out who knew what. >> attorney general in march, three weeks after fox news said gun found at murder scene of a border patrol agent the gun was sold to agency he supervised, a.t.f. >> when did you first know about the program officially called fast and furious? >> not sure of the fact date but i probably heard of it for the first time in the past few weeks. >> holder claim he is didn't know about fast and fure you, even though it was a.t.f.'s most sensitive operation. >> the size of this operation was so huge, so tremendous that it is impossible to do things in a bureaucracy