CLIFF MAY ASKS:

Can someone tell me what controversial procedures have been used at Guantanamo Bay? As far as I’m aware there is not a shred of hard evidence — and certainly no proof — that torture or even enhanced interrogation methods have been employed there.

more

Air Force Lieutenant General Randall M. Schmidt, appointed to investigate abuses at Guantanamo Bay, said, “For lack of a camera, you could have seen in Guantanamo what was seen at Abu Ghraib.”

more

Detainees at Guantanamo Bay have been left chained in their own urine and feces for a day or more.
more (I think the easiest way to find this is to search for “Guantanamo”)

…that’s the links I happened to have already on my hard drive, without searching. So, you know, not exhaustive. Probably searching here would also prove informative.