U.S. Army Gen. Martin E. Dempsey, left, chairman of the Joint Chiefs of Staff, and his South Korean counterpart, Adm. Choi Yoon-hee, salute during an honor ceremony at the headquarters of the South Korean Joint Chiefs of Staff in Seoul, South Korea, March 27, 2015. Dempsey is visiting Seoul as part of a two-day trip to reinforce the U.S.-South Korean alliance. DoD photo by U.S. Navy Petty Officer 1st Class Daniel Hinton