Mark Begich actually said...

I am concerned about a potential threat to U.S. national security and military operability: the issue of rare earth elements and our militar...

I support eliminating the threat to U.S. national security in Afghanistan and Pakistan by defeating al Qaeda.

Dr. Carter, what is the average cost of a launch on a Delta V and a Delta V Heavy?

I believe it is prudent to continually reassess the number of GBIs we need as our capabilities and knowledge of potential threats mature.