The widow of Tom Burnett, who helped lead the passenger revolt on hijacked Flight 93, says in a new book that he had struggled to figure out what he believed was a message from God that might have presaged the Sept. 11, 2001, attacks. Deena Burnett wrote that a year before the attacks, her husband, who rarely spoke openly about his faith, told her he'd been attending Mass daily to try to understand a message from God that had "something to do with the White House." He told her he hadn't figured it out, "but I know it will impact...