During the first decades of the Cold War, a nuclear weapons program was active.
In 1948, the first solid plans on how to create an atomic weapon was presented to the Swedish National Defence Research Institute (FOA).
By the end of the 1960s, the Swedish government, because of military budget constraints, had to choose between a nuclear weapon or a new fighter aircraft (the Saab 37 Viggen).
In 1972, the last remnants of a plan for nuclear weapons was discontinued when the FOA stopped their experiments with plutonium.
[2] In March 2012, Sweden exported 3.3 kilograms (7.3 lb) of plutonium and approximately 9 kilograms (20 lb) of natural and depleted uranium to the United States under framework of the Global Threat Reduction Initiative.
In 1940, work on the gas was temporarily halted, but, by the end of World War II, new programmes were soon a priority for the Swedish military.