The Guantanamo Conundrum

As we know (or should know), many of the prisoners held by the US at Guantanamo Bay are completely innocent.

Some of the innocent have been released, but many are still there, and the conditions under which they have been held have (understandably) radicalized them.

So here's the conundrum:  what is the morally right thing to do with people who would never have posed any threat to us if we had left them alone, but now that we have imprisoned and tortured them could be a threat to us if we released them?