OTD…April 25 and the Hubble deploy

#OTD in 1994…Discovery launched to develop new techniques for monitoring Earth’s environment from space…and in 2006…Construction of the space station resumed as Atlantis delivered a power-generating truss

#OTD…Launch of Endeavour in 2001 to deliver Canadarm2 to the space station

#OTD in 1992…Columbia launched the LAGEOS-2 laser-reflection satellite