 A staff sergeant of the maintenance crew was killed while attempting a rescue and a total of twenty were hospitalized.Another site at Potwin, Kansas leaked NTO oxidizer in April 1980 with no fatalities, and was later closed.In September 1980, at Titan II silo 374-7 near Damascus, Arkansas, a technician dropped an socket that fell , bounced off a thrust mount, and broke the skin of the missile's first stage, over eight hours prior to an eventual explosion.