OGCh 18 - Space launch mission detailed information
OGCh 18 18
20 MAY 1968
Soviet Space Program
Missile equipped with the 8F021 warhead
The R-36O was the only orbiting military nuclear weapon ever deployed, although in order to remain legal under international treaties it was a 'fractional orbital' weapon. Although American infrared early warning satellites invalidated the 'surprise attack' component of the concept, 18 missiles were operational from 1969 to 1983.