NASA just launched a new lunar probe Friday:
NASA launches rocket to probe mysterious lunar dust | Al Jazeera America
I don't think the US space program is dead. The shuttle program was ended, but the shuttles were not the most efficient way to get into space. Space exploration does not have the same wide-ranging support in the US that it had in the 60's when we were at the height of the so-called "space race" but that does not mean it's over. On the contrary, NASA is still alive and kicking, just focusing on different kinds of projects, and more welcoming of international cooperation in space programs, which in my mind is a good thing.