Declassified: US Detonated 3 Nuclear Devices Over South Atlantic in 1958

In 1958, the United States secretly carried out Operation Argus, detonating three nuclear devices in the stratosphere above the South Atlantic Ocean. The explosions created artificial auroras and temporary radiation belts encircling Earth. The primary objective was to establish a defensive shield against Soviet ballistic missiles and radar systems. However, the rapid dissipation of these radiation barriers triggered significant disruptions to global communications. The unintended consequences of the tests ultimately contributed to the drafting of international treaties prohibiting nuclear testing in outer space.