SAN JUAN, Puerto Rico - After more than five years, the Pentagon revealed why it is holding a Saudi nicknamed "the Professor" at Guantanamo Bay, saying he once lived with a Sept. 11 conspirator and received a stipend from Osama bin Laden. Shaker Aamer's lawyer denies the allegations, made after British Prime Minister Gordon Brown last week requested the release of the Saudi, who has been an unofficial leader among the detainees, and four other former residents of Britain. The Bush administration, which has been urging other nations to accept Guantanamo prisoners amid international pressure to close the military jail,...