May Day General Strike
California Highway Patrol officers take positions at the Golden Gate Bridge in anticipation of May Day demonstrations in San Francisco, California May 1, 2012. Authorities anticipated demonstrators would shut down the bridge, but agreement was reached to prevent that action. REUTERS/Robert Galbraith
TOKYO/UNITED NATIONS The United States is not ruling out the eventual possibility of direct talks with North Korea, Deputy Secretary of State John J. Sullivan said on Tuesday, hours after Pyongyang warned nuclear war might break out at any moment.