A friend of mine, an officer who is currently serving in the US army in Iraq, came with me to the 2005 DARPA Grand Challenge. His response to the whole event was "Hell, I don't need robots that can go 150 miles. I need robots that can go 100 yards." What he meant was that he wanted a robot capable of going a short distance that could detect/disable IUDs and mines. That's a pretty risky endeavour for a person to do.