'Aerial mine laying blockades Japanese shipping' depicts Allied preparations and dropping of mines in the Pacific Theater. A row of bombs in a dump at Taiwan Air Base in Formosa. 2000 pound MK25 mine. Men work on extender and the clock delay mechanism. MK 25 transported to B-29 aircraft named Flak Alley Sally. Men attach a parachute to the end of the mine. A detonator inserted in the side of the mine. Soluble washers placed in arming devices. Officers including Nazuma Ko layout mine pattern. 313th Bombardment Wing Group Commanders briefed in a war room. B-29 takes off and in flight. Bomb bay of the aircraft opens and MK 25 mine dropped. Parachute attached to the mine opens and descends. Parachute falls in the water. Another mine being dropped and falls in water.

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