The nuclear weapon was a weapon that the Libyan terrorists hoped to build, with the assistance of Dr. Emmett Brown.


Fortunately, the Libyans were foiled from building their nuclear weapon when Doc appropriated their plutonium for a less harmful project — i.e. to power his DeLorean Time Machine. Unfortunately for Doc, the Libyans were none too pleased when they discovered their bomb consisted instead of an empty casing filled with used pinball machine parts, and shot him dead for his deceit at Twin Pines Mall on October 26, 1985.

Before Marty McFly returned from 1955, he wrote a warning letter to Doc, who wore a bulletproof vest on the night he was to be shot and survived the attack.