3AD "Suitcase Bomb"
The Mk-54 Special Atomic Demolition Munition (SADM)
Above: The carrying case for the Mk-54 SADM, which had a yield from .01 to 1.0 kiloton. The entire unit weighed less than 163 pounds. This weapon was in 3AD inventory with the 23rd Engineers from 1964 into (apparently) the 1980's.
Mario, hoy en día todas las nukes de EEUU son de dos fases. La primera seguramente sean de plutonio con un boosted. En cuanto al detonador, se utiliza el Tubo Pulso de Neutrones.