I understand what you're trying to say, however...the last thing I would like to see (and the whole world) is USA or any other country using nuclear weapon.

And also not to scare anyone and NOT to argue, so you decide if you want to read it or not - it's just the facts - Afghanistan is a place where almost everywhere are mountains and it's one of the toughest places to fight in. I wouldn't say their threats are meaningless.Probably USSR also thought like that (small country,etc.) 'till they have lost with them...Of course a lot depends on who will support them... Plus Talibans are religion fanatics, they don't have anything to lose, they fight 'till death.