A Secret Soviet Plan to Nuke America From the South Pole Was Working. Until UFO Hunters Looked Up.

When a mysterious crescent appeared over Moscow in 1967, alien enthusiasts were unaware they were actually tracking a 3-megaton weapon designed to bypass American radar.
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How NASA pulled off the greatest rescue in space history

In April 1970, an oxygen tank explosion crippled Apollo 13 on its way to the Moon, instantly transforming a routine lunar ...