KT: I think you are being slight obfuscatory here. We don’t have blacksites, once someone’s in US custody, they are ours and treated accordingly.

Foreign gov’ts do have blacksites, and I can name a few, but these are sites where prisoners are kept by foreign gov’ts, not the US, it might be at the request or behest of the US, but they aren’t in our custody.
Once remanded to us, they end up in Gitmo. (ala the few last year who mysteriously disappeared from Landi Khotal and appeared in Gitmo) Sometimes this is referred to as rendition, and some of the “transfer points” in Europe have been exposed as well, but… those people were not in US custody at those points.