[oyez]

Seems to me the B61 was modified for the Bomarc SAM missile. The theory was that it would be capable of taking out a squadron of Soviet bombers in one shot. Or it could be used in a depth charge. A half dozen of those puppies thrown into the Northeast Atlantic and the Northwest Pacific would wreck the Soviet Balistic submarine fleet.

[ErnstStavroBlofeld]

Actually, When the Pershing missiles were being dismantled they were made into a B-61 variant. Each bomb is about 340 kilotons, about 15 times the size of the bomb dropped on Hiroshima. A feature is AMAC (Aircraft Monitoring and Control): Equipment installed in an aircraft to permit monitoring and control of the safing, arming, and fuzing functions of a nuclear bomb or missile delivered by the aircraft.