Terrorism suspects or other defendants who might be considered at risk or a risk to others in the general population are typically housed in a section of the facility known as the Special Housing Unit, or SHU. Defendants in that section are housed one or two per cell and mostly confined to their cells, except for limited exercise periods each day.

WSJ: Bin Laden Son-in-Law Pleads Not Guilty

We were in a drab one-story building behind a meat-trucking facility outside of Boston, in a back section that Ernst called his I.

NEWYORKER: Big Med