Charges dropped against alleged 20th hijacker: Pentagon WASHINGTON (AFP) - The Pentagon has dropped charges against Mohammed al-Qahtani, the alleged "20th hijacker" in the September 11 attacks on the United States, a Pentagon spokesman said Tuesday. Susan Crawford, the convening authority for war crimes trials by special military commissions, gave no explanation in dropping the charges against al-Qahtani "without prejudice," said Commander Jeffrey Gordon. "They have been dismissed without prejudice, which means they can be reinstituted at any time," he said of the charges.