'Aerial mine laying blockades Japanese shipping' depicts Allied preparations and Operations of the 21st Bomber Command, for aerial dropping of mines in the Pacific ocean to thwart Japanese shipping in World War 2. . Rows of stacked bombs are shown in a munitions dump at Tinian Air Base in the Mariana Islands. Camera focuses on a 2000 pound MK25 mine. Men demonstrate hydrostatic safety devices on the mine, including an extender that holds the detonator away from the booster charge until sufficiently immersed, and a clock delay mechanism. MK 25 transported to B-29 aircraft named Flak Alley Sally. (This is B-29 Number 42-24878 of the 40th Bomb Squadron, 6th Bomb Group, 313th Bomb Wing.) Airmen attach a parachute to the end of the mine. Another inserts the detonator and its extender plus the timer device into the side of the mine. Soluble washers are then placed in arming device ports. Scene shifts to Army and Navy planners working with maps, dividers, and a Weems plotter to mark the target location and mine laying pattern. 313th Bombardment Wing Group Commanders are seen being briefed in a war room. Next, engines are seen starting on a B-29, that then takes off and is seen in flight.(Narrator notes that missions are flown at night, but this one is photographed in the day to show how it is done. View of B-29 cruising above clouds. View from inside the aircraft, of bomb bay slowly opening. View of the target area below. The parachute of a mine opens by a static line as it falls from the bomb bay. Scene shifts to water level closeup of a mine striking the water. ('Presumably a demonstration inserted here.) Final scene shows a Navy Grumman TBF/TBM Avenger torpedo bomber dropping a parachute equipped mine. in the same location.
Allied invasion of Palau Islands during World War II. A coast under bombardment as smoke rises. Shells splash among landing crafts near a beach. Allied troops aboard a Landing Craft Vehicle wait for a signal. Medics administer blood plasma to a wounded on the beach. Wounded soldiers being carried on litters. A corpsman administers first aid and records information.
Allied invasion of Palau Islands during World War II. Marines on a beach. A Marine strings a wire in the foreground at the beach. The Marines march towards the front. They rest on a beach. A 40 mm anti aircraft gun placed behind a sandbag mound. A Landing Vehicle Tracked in shallow waters after being knocked out in Japanese firing.
Allied invasion of Palau Islands during World War II. A Marine helps a wounded as they move past a tank. A wounded Marine on a litter being carried away. Litter wounded being loaded aboard a Landing Vehicle Tracked ( LVT ). The Marines load ammunition in the LVT for transfer to the front. A Marine arms a tank. A Marine digs in for the night.
Bombs dropping during a bombing mission over Japanese held Arakabesan, Palau in World War II. Aerial view showing the coast, roads, airfield of Arakabesan and surrounding islands. A formation of Consolidated B-24 Liberator bomber aircraft of the U.S. Army Air Force seen from a distance in flight.
U.S. Army Engineers and the part they played in the preparations for the nuclear bomb tests of Operation Sandstone on at Enewetak Atoll , Marshall Islands. Ships and small crafts underway. United States Engineer personnel move for the final installation. Security guard registers every person. Engineers install blast measuring devices on ground. They set up many instruments to be used during tests. An engineer climbs up domestic control station . Engineers in chow line and take food in plates. They eat food. They swim, play during for relaxation. They attend religious services. Engineers make concrete structures and paint a wall. Engineer places pressure gauge in a bunker. Engineers place electronic device underground and cover it with mud by using shovels. They lay steel cables in hook on a road. The aircraft carrying safety crew lands on the road. Front end loader is driven. Aircraft takes off. Engineers stack up the pile. An engineer protects devices from radiation effect by sealing it and closes station door.
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