Gallagher says such challenges argue against trying to survey current prisoners.

WSJ: Why Surveys Should Listen More to Prisoners

Burma experts are trying to establish precise figures for prisoners, as estimates vary.

BBC: EU plans to lift trade barriers for Burma exports

The Pentagon has been trying to gradually reduce the number of prisoners being held at the U.S. detention camp at Guantanamo Bay, Cuba.

NPR: Freed from Gitmo, Where Do Detainees Go?

They are probably trying to make us feel they take no prisoners off the field so we should take none on it.

BBC: CHOOSE A SPORT

They are probably trying to make us feel that as they take no prisoners off the field, we should take none on it and it's really good.

BBC: Tom Shanklin's column

The Prison Service is trying a variety of counter-measures, including drug-free wings where prisoners who promise not to use drugs are given additional privileges.

ECONOMIST: Drugs: The prisoner's dilemma | The

While Mr Abbas's people were busy trying to spin their way out of the Goldstone imbroglio, Hamas gleefully celebrated the release of the 20 women prisoners it had secured in exchange for a videotape of Gilad Shalit, an Israeli soldier seized by Hamas over three years ago.

ECONOMIST: The Palestinians and the Goldstone report: Stranded between America and the street | The