South Korean and U.S. Marines aim their machine guns during the U.S.-South Korea joint landing exercises called Ssangyong, part of the Foal Eagle military exercises, in Pohang, South Korea. (Associated Press)

Photo by: Ahn Young-joon

South Korean and U.S. Marines aim their machine guns during the U.S.-South Korea joint landing exercises called Ssangyong, part of the Foal Eagle military exercises, in Pohang, South Korea. (Associated Press)