An NPR investigation finds that the military court and prison at Guantánamo Bay, Cuba, have cost taxpayers billions of dollars, with billions more expected. Above, an American flag is seen through the war crimes courtroom at the U.S. naval base at Guantánamo Bay on Oct. 17, 2012.

An NPR investigation finds that the military court and prison at Guantánamo Bay, Cuba, have cost taxpayers billions of dollars, with billions more expected. Above, an American flag is seen through the war crimes courtroom at the U.S. naval base at Guantánamo Bay on Oct. 17, 2012.