WASHINGTON (Reuters) - The United States has brought conspiracy charges against a Yemeni man and a Sudanese man, both described as having close ties to al Qaeda leader Osama bin Laden (news - web sites), making them the first Guantanamo Bay prisoners to face criminal charges, the Pentagon (news - web sites) said on Tuesday. The Defense Department said Ali Hamza Ahmed Sulayman al Bahlul of Yemen and Ibrahim Ahmed Mahmoud al Qosi of Sudan were charged with a single count each of conspiracy to commit war crimes and will be brought to trial before a military tribunal. Pentagon spokesman...