Grant Bonin discusses the papers put out by the Space Frontier Foundation and the GAO on problems with NASA’s exploration plans in todays issue of The Space Review.

It’s worth the read, but being busy working on same plans, I would comment only on this bit:

Human-rating either the Atlas 5 or Delta 4 is likely to be an expensive proposition regardless of the fact that both boosters have already been developed (especially since no one really knows what it means to