Pending good weather, today will mark the start of the second-to-last mission ever for the NASA space program, when the shuttle endeavor takes off. NASA has been asking people to vote on the song that will wake up the astronauts, and we've been asking listeners for their nominations. Peter Spotts, science reporter for the Christian Science Monitor, joins us to talk about the launch and the end of the space program.

Today will mark the last launch of Space Shuttle Discovery, which made its maiden voyage back in 1984. This starts the countdown to the end of the Space Shuttle program, with final launches of Endeavor and Atlantis scheduled. Was the Shuttle Program worth it? To answer that question is Peter Spotts, science reporter for The Christian Science Monitor.