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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 round manhole and its cover. A manhole cover is a removable plate forming the lid over the opening of a manhole, an opening large enough for a person to pass through that is used as an access point for an underground vault or pipe. It is designed to prevent anyone or anything from falling in, and to keep out unauthorized persons and material.
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Beside material launched by humans into space with a range of launch systems, some instances particularly nuclear produce artificial ejecta, like in the case of the Pascal-B test which might have ejected an object with a speed of Earth's escape velocity into space.
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The video was provided by local media with permission. In the video, shot in the city of Shangluo in Shaanxi Province on August 1, a couple of manhole covers bounced up and down repeatedly on a ...
Manhole was released in the Gold series on January 29, 1981, and in the New Wide Screen series on August 23, 1983. [22] It is the first game in the Gold series and is a single-screen single-player game. The player must prevent pedestrians from falling into one of four sewers by temporarily bridging the open gaps with a manhole cover.
A manhole cover in downtown Detroit, at the corner of Congress and Bates, launched off the ground Friday afternoon, sending one to the hospital.