From the Bad Astronomy blog
"What I find difficult to write is that I watched the Congressional hearings for two hours this morning, whose very focus was on canceling science missions. And yet, during all that time, not once did Mary Cleave, NASA Associate Administrator of science, mention that within minutes of getting back to her office she was canceling a science mission."
http://www.badastronomy.com/bablog/2006/03/02/dawn-canceled/