FILE - In this Aug. 2010 file photo, former Defense Secretary William Perry testifies on Capitol Hill in Washington. The 88-year-old former defense secretary is troubled by the risks of catastrophe from the very weapons he helped develop decades ago. Atop his worry list: a nuclear terror attack in a major U.S. city or a shooting war with Russia that, through miscalculation, turns nuclear. A terrorist attack using a nuclear bomb or improvised nuclear device could happen “any time now – next year or the year after,” he said in an interview with reporters earlier this month.(AP Photo/Alex Brandon, File)