Members of the Lower Mekong Initiative, an international team from Cambodia, Laos, Myanmar, Thailand and Vietnam, and U.S. officials visit Chickamauga Lock on the Tennessee River in Chattanooga, Tenn., June 12, 2019. They toured the Tennessee Valley Authority project where the U.S. Army Corps of Engineers Nashville District operates and maintains the lock at the invitation of the United States in support of water development in the Lower Mekong River Basin.