Robert Foster Bennett

The U.N. can be very frustrating and at times impotent, but it can also be a valuable forum for discussion and resolution of world problems. We should not walk away from it just because it's failed to live up to its promise.

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.