Do you really believe we are not as strong as we were sixty years ago?
As for Bin Laden, he is a symptom of the greater disease.
Beware lest while watching the wolf in your neighbor's yard, you fail to notice that the faithful hound who has groveled at your feet for twenty years*
-- has got rabies and is stalking your child.
*Muslim guest-worker
It depends. If the American nation would stand with its back to the wall - you will be as strong as you were 60 years ago. If America is bound to extinguish some terrorism fires - no way. A democracy only can push through wars if it is acting in defense. For offensive wars there is usually too little patience among its voters. A full scale war with a nation willing and ready to fight (like with Iran i.e.) after a preemptive strike is likely to turn out as a complete disaster to the US, since it takes more than 4 years and 50.000 coffins to win it. If there was no compulsive need for such a mission that is understood by the American public every US administration in responsibility for it will be slaughtered. The outcome of this is complete surrender after 4 years since your nation is structurally not able to win lossy offensive wars due to its democratic system. Common people prefer peace and prosperity to death and decay. This should be quite easy to understand.