Ex-Army Reserves Arab linguist said the U.S. government listened to private calls . Another linguist said NSA eavesdropped on 'pillow talk ' conversations . NSA spokeswoman Judith Emmel said the agency 's Inspector General has investigated some of the allegations and found them `` unsubstantiated . '' U.S. surveillance program allows calls related only to terrorism to be monitored . Comment:
Ex-Army Reserves Arab linguist said the U.S. government listened to private calls . Another linguist said NSA eavesdropped on 'pillow talk ' conversations . U.S. surveillance program allows calls related only to terrorism to be monitored . Comment: