Mark 41 Thermonuclear Bomb
The Mk-41 "hydrogen" bomb, first produced in 1960, is now obsolete and no longer in USAF service. Designed to be carried by B-47, B-52 and B-70 aircraft, it was to be released at high-altitude, using parachutes to retard its fall, thereby permitting the releasing plane to escape from the target area safely.
The parachutes used for this 10,500-pound bomb were one 5-foot pilot chute and one 16.5-foot ribbon chute. Having either and air or contact burst option, the Mk-41 was in the megaton yield range.