Um, I'm pretty sure it hasn't. Sure, the shuttle program is over but that doesn't mean the space program is over. There's still a lot of activity going on at both NASA and private companies. The shuttle program has been slated to come to an end since circa 2004. They're currently working on a new space vehicle that has potential to replace the shuttle, it's called the Orion Multi-Purpose Crew Module. Furthermore, NASA plans to send two space probes to the moon to measure the gravity there. Don't forget SpaceX (kind of an interesting read here) and Virgin Galactic So, our interests in space aren't dead at all really, kind of a misconception I think. I may be wrong, sure, but looking at the evidence, it looks like it's really just begun.