[FReepaholic]

>>...Changing orbits requires a significant amount of fuel. Columbia didn't have enough to make it to the ISS, nor would have a "tug" that was based on the ISS....<<

Correct. But now that the remaining fleet all have ISS orbit capability, NASA should use ISS orbit inclination on all non-ISS missions when possible (Hubble is probably in a different orbit, however)

[RoughDobermann]

I don't disagree with that.