GUANTANAMO BAY, CUBA — The sun rises uneasily over Camp X-Ray, a temporary detention facility that housed dozens of suspected terrorists in the months immediately after the Sept. 11, 2001 attacks on the United States.

That uneasiness is matched by the discomfort that even some of the most stringent supporters of the global war on terror share about whether detainees who have been at Gitmo for years should continue to be held there.