'Guantanamo North':

This photo of inmates from the Communications Management Unit in Terre Haute was taken in 2007. Among those pictured are (left to right, bottom row) Ibrahim al-Hamdi, Avon Twitty, Enaam Arnaout.

March 3, 2011 - Part 1 of a two-part series

Reports about what life is like inside the military prison for terrorism suspects at Guantanamo Bay are not uncommon. But very little is reported about two secretive units for convicted terrorists and other inmates who get 24-hour surveillance, right here in the U.S.

M. Spencer Green/AP: The federal prison facility in Terre Haute, Ind., is home to one of the communications management units.

For the first time, an NPR investigation has identified 86 of the more than 100 men who have lived in the special units that some people are calling "Guantanamo North." The Communications Management Units in Terre Haute, Ind., and Marion, Ill., are mostly filled with Muslims. About two-thirds of the inmates identified by NPR are U.S. citizens.

Civil rights groups have filed lawsuits that accuse the U.S. facilities of some of the same due process complaints raised by people at the island prison. {continued}