WASHINGTON, Jul 25, 2002 (United Press International via COMTEX) -- Are there more American Taliban getting ready to pop out of the woodwork? Last month, Pakistani security police announced that they had captured two to six American citizens among Taliban refugees in that country, depending on which media source was reporting the story. But after that first announcement, the story pretty much died without a resolution -- until now. U.S. officials said Thursday that they have no knowledge of such American prisoners, other than the initial reports out of Pakistan. The United States has characterized three men -- John Walker...