Yeah but a point blank question...

There's multiple nuclear devices in every major city in the world. I happen to know where they are, only I'm not telling. Assuming you can't get me to tell, millions of people will die.

Would you :

1) Do nothing.
2) Use physical torture.
3) Use drugs.

I tend to agree that CIA-style water torture on every schmuck you capture in Iraq is immoral and shouldn't be done, but I think there are extreme circumstances where risking bad information is still better than doing nothing at all.