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The operation consisted of 29 explosions, of which only two did not produce any nuclear yield.Twenty-one laboratories and government agencies were involved. While most Operation Plumbbob tests contributed to the development of warheads for intercontinental and intermediate range missiles, they also tested air defense and anti-submarine warheads with smaller yields.
A manhole cover was accidentally launched from its shaft during an underground nuclear test in 1957. During the Operation Plumbbob nuclear tests, a 900-kilogram (1,984 lb) steel plate cap was blasted off the test shaft at an unknown speed and appeared as a blur on a single frame of film of the test.
Project 57 was an open-air nuclear test conducted by the United States at the Nellis Air Force Range in 1957, [1] [2] following Operation Redwing, and preceding Operation Plumbbob. The test area, also known as Area 13, was a 10 miles (16 km) by 16 miles (26 km) block of land abutting the northeast boundary of the Nevada National Security Site. [3]
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Manhole covers in Helsinki, Finland. Manhole closings are protected by a grating or manhole cover, a flat plug designed to prevent accidental or unauthorized access to the manhole. These covers are traditionally made of metal, [2] but may be constructed from precast concrete, glass reinforced plastic or other composite materials (especially ...
A U.K. woman had her breast cancer detected through AI after a routine mammogram came back as normal. Experts Drs. Nicole Saphier and Harvey Castro discuss the power of AI in cancer care.
In the film Help!, at the opening of the song, the head of the cult, Clang , appears from underneath a manhole cover in the middle of Ailsa Avenue, London, where parts of the film were shot. He stays there for the whole song, which the Beatles play in Lennon's quarters of the Beatles' shared flat .
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