FROM BBC:
US challenged over 'secret jails'
Two Yemeni men claim they were held in secret, underground US jails for more than 18 months without being charged, Amnesty International has said.
The human rights group has called on the US to reveal details of the alleged secret detention of suspects abroad.
Amnesty fears the case is part of a "much broader picture" in which the US holds prisoners at secret locations...
...Michael Ratner, of the US campaign group Center for Constitutional Rights, said the report was the first to touch on the "netherworld of secret detention facilities that the CIA is running".
Amnesty has previously reported on what it calls the long-term detention without trial or charge of prisoners in Yemen at the request of US authorities.
The US has also faced questions over its use of "rendition", a process by which terror suspects are sent for interrogation by security officials in other countries, some of which are accused of using torture... http://tinyurl.com/8b6ct
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