President Barack Obama arrives to be officially sworn-in by Chief Justice John Roberts in the Blue Room of the White House during the 57th Presidential Inauguration in Washington, Sunday, Jan. 20, 2013. (AP Photo/Larry Downing, Pool)
China's Defense Minister Liang Guanglie speaks at a news conference with U.S. Defense Secretary Leon Panetta, not seen, at the Bayi Building in Beijing, China Tuesday, Sept. 18, 2012. (AP Photo/Larry Downing, Pool)
China's Defense Minister Liang Guanglie speaks at a news conference with U.S. Defense Secretary Leon Panetta, not seen, at the Bayi Building in Beijing, China Tuesday, Sept. 18, 2012. (AP Photo/Larry Downing, Pool)
Secretary of State Hillary Rodham Clinton meets with Haitian President Michel Martelly at the Sae-A administration building at the Caracol Industrial Park in Caracol, Haiti, on Monday, Oct. 22, 2012. (AP Photo/Larry Downing, Pool)
Secretary of State Hillary Rodham Clinton meets with Haitian President Michel Martelly at the Sae-A administration building at the Caracol Industrial Park in Caracol, Haiti, on Monday, Oct. 22, 2012. (AP Photo/Larry Downing, Pool)
U.S. Secretary of Defense Leon Panetta applauds after presenting New Zealand Army Capt. Jason Tinsley, left, a U.S. Army Commendation Medal for his service in Afghanistan, in the auditorium at the World War II Hall of Memories at the Auckland War Memorial Museum in Auckland, New Zealand, Friday, Sept. 21, 2012. (AP Photo/Larry Downing, Pool)
U.S. Secretary of Defense Leon Panetta applauds after presenting New Zealand Army Capt. Jason Tinsley, left, a U.S. Army Commendation Medal for his service in Afghanistan, in the auditorium at the World War II Hall of Memories at the Auckland War Memorial Museum in Auckland, New Zealand, Friday, Sept. 21, 2012. (AP Photo/Larry Downing, Pool)
Defense Secretary Leon E. Panetta (center) shakes hands with Chinese Vice President Xi Jinping at the Great Hall of the People in Beijing on Wednesday, Sept. 19, 2012. (AP Photo/Larry Downing, Pool)
Defense Secretary Leon E. Panetta (center) shakes hands with Chinese Vice President Xi Jinping at the Great Hall of the People in Beijing on Wednesday, Sept. 19, 2012. (AP Photo/Larry Downing, Pool)
