Between global warming and killer space rocks, it only makes sense to spend like there is no tomorrow. /s
Killer space rocks is a better bet. there is at least some proof of them hitting the earth. Got a few friends in DARPA/NASA biz and they agree with this guy. We have only spotted 15% of the rocks that might be headed our way. Lots of times we have near misses that we find out afterward or only a few days ahead.