Shopping centers and WalMart are easier targets and more likely to have the desired effect by the terrorists. We shouldn't let fear of those scum keep us from moving forward in any area of our lives.
More unproven systems will, IMO, result in more wasted time and money.
We could most likely use the current type of rockets and technology and get a small colony on the moon in under 5 years.
IF we were serious about it.