U.S. Secretary of State John Kerry speaks at a news conference with South Korean Foreign Minister Yun Byung-Se, not pictured, at the State Department in Washington, on Tuesday, April 2, 2013. (AP Photo/Jacquelyn Martin)

Photo by: Jacquelyn Martin

U.S. Secretary of State John Kerry speaks at a news conference with South Korean Foreign Minister Yun Byung-Se, not pictured, at the State Department in Washington, on Tuesday, April 2, 2013. (AP Photo/Jacquelyn Martin)