(FILES) In this file photo taken on April 26, 2017 A South Korean K1A2 tank (blue) and a US M1A2 tank (red) fire live rounds during a joint live firing drill between South Korea and the US at the Seungjin Fire Training Field in Pocheon, 65 kms northeast of Seoul. - The US and South Korea said on March 3, 2019 they will end their annual large-scale joint military exercises as Washington pursues efforts to improve ties with North Korea. (Photo by JUNG Yeon-Je / AFP)