U.S. military prosecutors are seeking the death penalty for six Guantanamo Bay detainees charged Monday in connection with the Sept. 11, 2001, attacks, a Pentagon official said. - "The chief prosecutor has requested that the charges be tried jointly and that they are referred as capital in each defendant," Brig.-Gen. Thomas Hartmann told reporters as he announced the charges. - Among those charged is Khalid Sheik Mohammed, who reportedly described himself in interrogations as the mastermind of the attacks that killed nearly 3,000 people in New York and Washington. - "I was responsible for the 9/11 operation, from A to Z," U.S. transcripts presented in Guantanamo hearings last March quoted Mohammed as saying. - According to the transcripts, Mohammed also confessed to executing Wall Street Journal reporter Daniel Pearl, who was kidnapped and beheaded in Pakistan in 2002. - The accused face a total of 169 charges, including...