The space shuttle Endeavour rolls from Launch Pad 39A to Launch Pad 39B. The rare pad switch was deemed necessary after contamination was discovered in the payload changeout room at Pad A. The transfer began around noon and was completed about seven hours later. Still to come were the payloads for the STS-61 mission, the first servicing of the Hubble Space Telescope.
Image credit: NASA
Nov. 15, 1993
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