The main concern of the Soviets was that the Shuttle could swoop down and drop bombs without warning. (Both Reagan and the Soviet top leadership didn't care ab

The main concern of the Soviets was that the Shuttle could swoop down and drop bombs without warning. (Both Reagan and the Soviet top leadership didn't care about MAD, they cared about practical methods to stop incoming missiles. To get the arms limitations agreements signed, Reagan allowed the Soviets an exception to the anti-ABM ban to allow a ring of anti-ABM sites around Moscow, which exists until today. The "Star Wars" kinetic interception methods are also likely still active, though the laser methods probably never worked well.)