An internal audit has discovered that twenty computers have disappeared from a critical counterintelligence agency tasked with protecting America's nuclear secrets. Fourteen of the computers contained classified material, marking yet another in a string of embarrassments for the Department of Energy: The office in charge of protecting American technical secrets about nuclear weapons from foreign spies is missing 20 desktop computers, at least 14 of which have been used for classified information, the Energy Department inspector general reported on Friday. This is the 13th time in a little over four years that an audit has found that the department, whose...