In an alarming development, plans for a thermonuclear device were found Monday in a Pentagon desk drawer. 'These guys were definitely working on something,' said United Press International correspondent Nigel Afton-George, who came across the plans while touring a section of the compound damaged in a Sept. 11 attack. 'They had all sorts of manuals and plans for the construction and deployment of nuclear weapons. It's terrifying to think what they were planning to do with this stuff.' 