The U.S. Government has for the first time issued a public list of Guantanamo prisoners cleared for release or transfer, but who remain at the island prison because of difficulties finding a country willing to take them or because of concerns about sending them to their home countries.

The list (posted here) was filed in a series of federal court cases Friday morning and includes the names and serial numbers of 55 detainees. That’s almost exactly one-third of the 167 men currently imprisoned at Guantanamo Bay.

A significant number of the men are believed to be Yemeni. President Barack Obama suspended further transfers to Yemen in January 2010, stating that conditions in the country were too “unsettled” to ensure that detainees wouldn’t return to or embark on terrorist activities.