The Bulletin of the Atomic Scientists, which operates a symbolic Doomsday clock, today moved its minute hand a half-minute closer to the final hour.  It had been at three minutes before the hour; now it is at two-and-a-half minutes before the hour.  In a New York Times op-ed article, two scientists involved in the decision commented, "Never before has the Bulletin decided to advance the clock largely because of the statements of a single person.  But when that person is the new president of the United States, his words matter."