An Astronaut Explains How We'll Fall In Love With Space Again, Leroy Chiao, Gizmodo

"The Constellation Program was a reasonable path, five years ago, when the Vision for Space Exploration was first formulated. Since then, budget shortfalls have caused significant delays. Moreover, the goals evolved into a focus on getting astronauts back to the Moon, to the development of the Ares family of rockets and the Orion spacecraft. The public generally is bored with going back to the Moon, since we already did this forty years ago."