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Chinese laborers use primitive tools to construct an airfield for United States B-29 aircraft in China during World War II.
Chinese laborers build an airfield in Western China during World War II. Nearly 70,000 Chinese laborers walk to an airfield construction site. Men, women and children carry primitive tools as they walk towards the airfield site. Laborers work with primitive tools as they construct an airfield for United States Army Air Forces B-29 Super fortresses. Laborers break stones with hammers. A treadmill being used too mix water and sand. Laborers eat chow for lunch. A 10 ton roller being hauled over the runway as men pull it. A B-29 aircraft in flight. Another B-29 aircraft taxis along and takes off. Chinese laborers build an airfield in Western China during World War II. Nearly 70,000 Chinese laborers walk to an airfield construction site. Men, women and children carry primitive tools as they walk towards the airfield site. Laborers work with primitive tools as they construct an airfield for United States Army Air Forces B-29 Super fortresses. Laborers break stones with hammers. A treadmill being used too mix water and sand. Laborers eat chow for lunch. A 10 ton roller being hauled over the runway as men pull it. A B-29 aircraft in flight. Another B-29 aircraft taxis along and takes off.
U.S. soldiers patrol the West Berlin border and look into East Berlin through binoculars in Germany.
Aerial view of monuments and buildings in West Berlin including the Victory Column (Siegessäule Großer Stern, 10557 Berlin, Germany) and the war damaged Kaiser Wilhelm Memorial Church (Breitscheidplatz, 10789 Berlin, Germany). Street view of cars and buildings near Kurfürstendamm. View of the Brandenburg Gate obstructed by the Berlin Wall. U.S. Army soldiers patrol the West Berlin border in Germany. American soldiers of Berlin Brigade in a Jeep as they move past Charlie Checkpoint. The jeep moves along the Berlin wall as soldiers patrol the borders of West Berlin. Point of view (POV) shot from jeep as it passes immediately beside the Berlin Wall. Soldiers get out of the jeep and climb up an observation tower. They view East Germany through binoculars. Views of Berlin Wall and barricades and obstacles in the "death strip" area beyond the wall. The U.S. Army soldiers carry M-60 machine guns. They reenter the jeep and continue their patrol. Views of graffiti painted on the Berlin Wall. A sign, "You are leaving the American Sector" in Checkpoint Charlie.
The mechanism of working of a nuclear device and the devices that ensure safety of nuclear weapons in the U.S.
Safe use of nuclear weapons by the United States Air Force. A nuclear bomb on a trailer. a C-119 aircraft takes off in background. An animation shows the nuclear material used in weapons. Fissionable material is surrounded by a layer of high explosives.. Detonators being fired simultaneously at the edges of the high explosives causes implosion that exerts pressure on the fissionable material, causing it to compress into a critical mass that results in nuclear explosion. In an event in which the high explosive, itself, is accidentally ignited, it will burn unevenly, and not provide the uniform circumferential pressure needed to cause the core of nuclear material to compress into a critical mass, even though it may be broken up and scattered.. Various safety features of a nuclear weapon. A battery which provides current, armed switch which controls the flow of current. Thermo fuses which ensure protection against fire. Various mechanical devices like safety pins and wires with seals also ensure safety of nuclear weapons and prevent untimely detonation.
U.S. Air Force personnel handling nuclear weapons.Technicians being examined for reliability
Safe use of nuclear weapons by the United States Air Force. A Sergeant (E4) technician works on a nuclear bomb as a Technical Sergeant (E6) supervisor looks on. A Quality Assurance Evaluator takes notes. The technician reacts angrily after dropping a T304C Continuity Tester and his supervisor corrects him. The technician is then questioned by a doctor to ensure his reliability for a nuclear program. Men around an aircraft as a trailer carries a nuclear bomb near the aircraft. The bomb being attached under the fuselage of the plane. Men work in groups using the two men concept to assure that no individual is ever in a position to arm, launch, or detonate a nuclear weapon.
Workers use rotators to break rocks in an iron mine in New York, United States.
The various types of drills and bits used for drilling into rocks in the United States. An iron mine in northern New York. Men work on rocks in 40 to 100 feet deep mines. Rotators or automatic hammers being used to cut into rocks by a man. The rotators being operated by a hand as they drill into an ore bench in a mine. A man operates a hand rotator to break a large rock fragment.
U.S. paratroopers board aircraft and take off from England for the D day invasion during World War II.
Allied invasion of Normandy, France during World War II. United States paratroopers from different professions with camouflage make up on their faces they prepare to leave England for the invasion of Normandy. The paratroopers being briefed before the take off. They put on their combat gear. U.S. General of the 9th Air Force Brereton shakes hands with the paratroopers. The paratroopers board an aircraft and take off. U.S. Army Air Forces C-47 aircraft take off from different airfields in England to bombard Normandy, France. Aircraft in flight. A gunner aboard an airborne aircraft. Bombs being released. The bombs explode causing a pillar of smoke to rise up. German coastal defenses being bombed.
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