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Dan Beaumont Space Museum: Explorer 3 / Jupiter C rocket, Pad LC-5, Cape Canaveral, March 26, 1958
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Dan Beaumont Space Museum: Explorer 1 atop a Jupiter-C in gantry, LC-26A, Cape Canaveral, January 31, 1958
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Dan Beaumont Space Museum: Explorer-1 launch: Von Braun with (ABMA) and JPL, "Sputnik challenge" with Explorer one (Development in 84 days) January 31, 1958