Taylor Dinerman says that we should be optimistic about the political staying power of the president's Vision For Space Exploration.

Unfortunately, the example he uses doesn't inspire confidence in me, at least in terms of the potential for success of the program, though it may continue to get funding ad infinitum, as our ineffective space activities already have for the past three decades since Apollo. After all, over two decades after Reagan made his "Star Wars" speech, we still don't have a missile defense.