Tags: astronauts; B. G. MacNabb; Cape Canaveral; Cape Canaveral AFS; Cape Canaveral Air Force Station; CCAFS; GDA; General Dynamics/Astronautics; Hangar S; Mercury; moat; moats; NASA; National Aeronautics and Space Administration; outer space; Project Mercury; Sigma 7; space exploration; space programs; Wally Schirra; Walter Marty Schirra, Jr.
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