Bound, masked and surrounded by heavily armed U.S. Marines, 20 of the most dangerous al-Qaida and Taliban prisoners arrived for indefinite incarceration at this remote Caribbean naval base. The prisoners' arrival Friday came four months after the Sept. 11 terrorist attacks on the World Trade Center and Pentagon. The prisoners face intense interrogation, especially concerning the whereabouts of Osama bin Laden, accused by the United States of orchestrating the attacks. "These are people who would gnaw through hydraulic lines in the back of a C-17 to bring it down," Gen. Richard Myers, chairman of the U.S. Joint Chiefs of Staff, ...