 All Atlas-Agena vehicles contained an Inadvertent Separation Destruct System (ISDS) to destroy the Agena in the event that it separated prematurely from the Atlas, a situation that could be caused by a booster hard-over or if the Atlas self-destructed in flight.The ISDS charges were mounted on the adapter section between the two vehicles and would activate if a series of tripwires were broken.During the coasting period between staging, the ISDS charges were disabled.