Subject: Name the bomb developed in 1977 which kills people but leaves buildings intact?

Sender: On This Date in History
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Country: United States
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From	On This Date In History <[email protected]>
Subject	Name the bomb developed in 1977 which kills people but leaves buildings intact?
Date	April 21, 2022 4:01 PM

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Name the bomb developed in 1977 which kills people but leaves buildings intact? ​