Keith's note: In a few short days we will have used up 10% of the 21st Century.

When I was growing up in the 1960s and 70s, this was supposed to be a magical time - one where all manner of incredible things would be possible - even routine. In some ways it has been - witness the extrasolar planet discoveries of late. Yet in other areas NASA still flies a space shuttle that was designed more than a generation ago - and NASA is now struggling to replace it.

With regard to space exploration and utilization, have we wasted this decade? What has been done right? What has been done wrong? While NASA is not (and should not) be the only game in town when it comes to space, what should the President direct NASA to do in the decade ahead? Moreover, what should he direct NASA not to do?