I guess sodium pentathol is a safer bet.
agreed. Get them to talk? What if the one we are trying to get talking doesn't know anything, and we got the wrong guy? At what point do we say, well, he doesn't know anything, let's let him go. Drugs are the way to go. There is a drug that robbers use against people and get them to empty out their bank accounts. The victim functions but cannot resist. Sobers up to find he or she's been cleaned out. Use THAT drug to get the real terrorists to spill the beans. If the subject knows nothing, then in a state unable to resist that will be found out.