A Timeline of Nuclear Disarmament

Armed
After World War II, both the United States and the Soviet Union began to aggressively develop and stockpile nuclear weaponry, outfitting planes and submarines with the capacity to strike the enemy at a moment's notice. In this photo, a crew prepares for a test launch on the Regulus, a submarine with nuclear firing capabilities, in the Pacific.

• Turning Russian Nukes into U.S. Energy