Our country killed over 20 people in an assassination attempt on Bin Laden in 1998 in Afghanistan. I feel that Clinton's cruise missile attacks just may have been inspirational to Bin Laden and his followers simply based on my gut reaction to how I'd imagine I would feel if Boeing had cruise missiled over 20 of my family and friends.
After all, at least 20 of my family and friends _work_ for Boeing!
http://en.wikipedia.org/wiki/Bombing_of_Afghanistan_and_Sudan_(August_1998)