SOFIA is still alive
KAO was retired a while ago (it helped to discover the rings of Uranus in 1977),
but despite some threats, its successor SOFIA is still alive.
See here:
http://www.sofia.usra.edu/
I know things are better in space, but if budget cuts keep rearing their
ugly heads, then having some kind of plan that will allow astronomy science
to continue is better than the alternative - ignornace and stagnation.
