In what would be a key change in U.S. policy, the Pentagon may formally require military prosecutors to observe a U.N. convention against torture in their use of evidence during tribunals at the Guantanamo Bay prison camp. Such a move would represent a formal bar on the use of any evidence obtained by torture in prisoner tribunals at the U.S. naval base in Cuba, where the United States has held hundreds of foreign terrorism suspects since early 2002. Full Story