September 19, 1957 – First American underground nuclear bomb test (part of Operation Plumbbob). http://ift.tt/1vmw0wk
Friday, September 26, 2014
@History_Pics: September 19, 1957 – First American underground nuclear bomb test (part of Operation Plumbbob). http://ift.tt/1vmw0wk
@History_Pics: September 19, 1957 – First American underground nuclear bomb test (part of Operation Plumbbob). http://ift.tt/1vmw0wk
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