OTD…May 18 and launch of Apollo 10

#OTD in 1994…Endeavour launched on the second Space Radar Laboratory mission

OTD in 1994…Endeavour experienced an on-pad abort due to a main engine problem during startup

VIDEO: The winged spaceship Columbia returned to Earth with a pinpoint landing at Edwards Air Force Base on this day 35 years ago, concluding the maiden flight of the space shuttle.