U.S. President Barack Obama speaks about the Defense Strategic Review at the Pentagon in Washington January 5, 2012. Obama unveiled a defense strategy on Thursday that calls for greater U.S. military presence in Asia and envisions cutting troops in Europe as the Pentagon seeks to reduce spending by nearly half a trillion dollars after a decade of war. From left to right are Secretary of Defense Leon Panetta, Chief of Staff of the Army Gen. Ray Odierno, Obama, Commandant of the Marine Corps Gen. James Amos and Chairman of the Joint Chiefs of Staff Martin Dempsey. REUTERS/Kevin Lamarque (UNITED STATES - Tags: MILITARY POLITICS)