66th Incheon Landing Operations Commemoration ceremony, Incheon, South Korea - 09 Sep 2016
South Korea marines' amphibious assault vehicles sail during the 66th Incheon Landing Operations Commemoration ceremony in waters off Incheon, South Korea, . Incheon is the coastal city where the United Nations Forces led by U.S. General Douglas MacArthur landed in September, 1950 just months after North Korea invaded the South. North Korea said Friday it conducted a "higher level" nuclear warhead test explosion, which it trumpeted as finally allowing it to build "at will" an array of stronger, smaller and lighter nuclear weapons. It is Pyongyang's fifth atomic test and the second in eight months