keywords: guantanamo yemeni laden osama qaeda
text: Confusion as Yemeni Faces U.S. Military Tribunal  GUANTANAMO BAY U.S. NAVAL BASE, Cuba (Reuters) - A Yemeni  accused of guarding Osama bin Laden with explosive belts seemed  to acknowledge his al Qaeda membership on Thursday before a  U.S. military tribunal hearing fraught with translation  problems.