I don't support government lying to the citizens it serves.
I hate to sound Clintonian, but its not lying. Going back to the moon and then to Mars is exploration and that is valuable in its own right.
But the military implications are obvious to anybody whos thinking, and shouldnt have to be spelled out.
In military and foreign intelligence matters, it is not necessary for the government to broadcast every ulterior motive to our adversaries. Do you think China is building a space program for the pure joy of scientific discovery?