1958 US–UK Mutual Defence Agreement as an atomic spy, caused the proposal to be dropped. The June 1951 defection of Donald Maclean, who had served as a British member of the Combined Policy Committee from January 1947 to August 1948, reinforced the Americans' distrust of British security arrangements. The first British atomic bomb was successfully tested in Operation Hurricane on 3 October 1952, but although it was more advanced than the American bombs of 1946, Britain was still several years behind in nuclear weapons technology. The United States conducted Ivy Mike, the first nuclear test of a true thermonuclear device (also known as a hydrogen
Action of 12 October 1950 be destroyed during operations in that area. Sometime in 1952, Lieutenant McMullen received an anonymous package containing the "Pirate"s battle flag and on May 28, 1985, it was donated to the Naval Historical Center and is on display at the Korean War exhibit. Action of 12 October 1950 The Action of 12 October 1950 was a battle fought during the Korean War. While conducting Operation Wonsan against sea mines in Wonsan Harbor, a squadron of US Navy warships was attacked by North Korean Army (KPA) batteries. During the operation, two US ships struck mines and sank while the remaining vessels