"In this Friday Oct. 15, 2010, file photo, Gen. David Petraeus, the top U.S and NATO commander addresses RUSI members on ""The International Mission in Afghanistan,"" at the United Services Institute in central London. Former CIA Director Petraeus, whose career was destroyed by an extramarital affair with his biographer, was expected to be sentenced Thursday April 23, 2015 in federal court in Charlotte for giving her classified material while she was working on the book. (AP Photo/Dan Kitwood, Pool, File)"