committee backs him up, saying &pthere's "no evidence" top aides lanny breuer,,gary grindler, monty wilkinsonrearms aad explosives phoenix divvsion was "walking guns""to cartels as part of an enforcement strategy. republlcans disagree.issa says, "lanny breuer knew, approved and continued to approve this kind offa ppocess, this kind of a program long after brian terry was gunned down with fast and &pfurious weapons." issa points to three memo's: in april 2010 weinstein tells breuer "the a-t-f let a bunch of guns walk" in a previous case, months later breuer suggests allowing straw buyers justice departtent said the alllgation that "a-t-f knowingly allowed the sale of assault weapons to a strrw purchaser who then transported them intoomexico - is false." fast and furious was not just about who knew. it was who was kept from knowing; the u-s ambassador to mexico city,,the a-t-f agents in mexico." the report clearsstop a-t-f melson, billyyhoover or bill &pmacmahon and instead blames a-t-f ann the u-s attorneyss office in phoenix for lying orr cass. late today, congressman issa said hee belleved h