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[i]Yesterday, it was exactly 54 years ago that astronaut Walter 'Wally' Schirra orbited Earth 6 times in the Sigma 7 spacecraft. The name of the NASA mission was Mercury-Atlas 8, and Schirra picked 'Sigma 7' as the name for the spacecraft. Using the mathematical symbol for summation as appropriate for an "engineering evaluation", and the "7" to refer to the seven Mercury astronauts. On his wrist, an Omega, the first Speedmaster in Space.[/i]
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