<P> In August 1945, on Truman's orders, two atomic bombs were dropped on Japanese cities . The first bomb was dropped on Hiroshima, and the second bomb was dropped on Nagasaki by the B - 29 bombers named Enola Gay and Bockscar respectively . </P> <P> Shortly after the end of the Second World War in 1945, the United Nations was founded . During the United Nation's first General Assembly in London in January 1946, they discussed the future of Nuclear Weapons and created the United Nations Atomic Energy Commission . The goal of this assembly was to eliminate the use of all Nuclear weapons . The United States presented their solution, which was called the Baruch Plan . This plan proposed that there should be an international authority that controls all dangerous atomic activities . The Soviet Union disagreed with this proposal and rejected it . The Soviets' proposal involved universal nuclear disarmament . Both the American and Soviet proposals were refused by the UN . </P> <P> In the years immediately after the Second World War, the United States had a monopoly on specific knowledge of and raw materials for nuclear weaponry . American leaders hoped that their exclusive ownership of nuclear weapons would be enough to draw concessions from the Soviet Union but this proved ineffective . </P> <P> Just six months after the UN General Assembly, the United States conducted its first post-war nuclear tests . This was called Operation Crossroads . The purpose of this operation was to test the effectiveness of nuclear explosions on ships . These tests were performed at Bikini Atoll in the Pacific on 95 ships, including German and Japanese ships that were captured during World War II . One plutonium implosion - type bomb was detonated over the fleet, while the other one was detonated underwater . </P>

Who has more nukes in the cold war