OTD…May 4 and STS-30

Neil Armstrong, Buzz Aldrin and Michael Collins launched today in 1969 aboard Apollo 11 for one of the defining moments of the 20th century — man’s first landing on the moon.

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

#OTD in 1984…Challenger launched the Earth Radiation Budget Satellite