FILE - In this July 2, 2014 file photo, US Marshals patrol the area outside federal court in Washington where Libyan militant Ahmed Abu Khattala, charged in the deadly attack at the U.S. diplomatic outpost in Benghazi, is being held for a detention hearing. After Ahmed Abu Khattala was captured in Libya last year to face charges for the Benghazi attacks, he was brought to the U.S. on a 13-day sea trip that his lawyers say should have been done in 13 hours by plane. The prosecution of Abu Khattala is focusing attention again on an interrogation strategy that the Obama administration has used in just a handful of recent terrorism cases. (AP Photo/Manuel Balce Ceneta, File)