NASA's Extended Science Missions in Peril, Paul Spudis, Air & Space
"We do not yet know how the Senior Review will turn out. NASA is famous for wanting to "move on" to the next thing and often abandons working spacecraft. A bird in the hand is worth two in the bush but as things currently stand, there isn't much in the mission pipeline to move on to. Planetary Science has taken several massive budgetary hits in the past few years, with more on the way. The termination of LRO and MER will not help move new missions off the drawing board. Money not spent on these extended missions will probably slide into SMD's Black Hole of Funding (the James Webb Space Telescope) or be dissipated on new paperwork, committee meetings and concept studies. It would be both fiscally prudent and programmatically responsible for NASA to fund and retain these working and still productive extended missions."