The easiest way to take Al Quaida out, and most ( Tee Leader Of Pakastan ect) feel Bib Laden is hiding in the Tora Bora Mountains is send in bombers and Flatten that whole region, distroy the mountains and surrounding area and as far as those who say "We can't there will be too much Colleteral Damage" yes there will be, but there tremous collateral Dameage on 911
In any war their will be civilian deaths no way to avoid that, if you level that mountain area it won't take Al Quaida out 100% but it will certain severly hamper theirr efforts