Take 'em to court. A federal criminal court, that is, not a newfangled court offering at best due process lite (as I too argued here).
Former federal prosecutor Kelly Anne Moore (right), a partner at Morgan Lewis in Manhattan.
Moore, who was "recognized by President George W. Bush for her contributions to the war on terrorism" while serving from 2002 to 2006 as chief of the Violent Crimes and Terrorism Section in the Office of the U.S. Attorney for the Eastern District of New York, in Brooklyn, writes:
The United States does not need a new and untested detention system for terrorists. The existing federal system has a proven track record of dealing with complex prosecutions.
... I have had firsthand experience doing just what proponents of a national-security court say is impossible.
Where are the persons she pursued today? The federal Supermax prison in Florence, Colorado.