GITMO - Should We Close It?

I'm not sure I'm sold on the idea of closing the Guantanamo facility.

One. Our prisons are overflowing already, where would we put the prisoners?
Two. Do we want these prisoners in the general population with others? They could very quickly set up a fundamentalist entity in our prisons that could easily manage operation on the outside through visits and other channels. The security at most of our prisons is good but we've seen that mobsters can run their organization even while behind bars.
Three. Who is going to pay for it all?

What do you think?