Attorney General Eric Holder Attends Memorial Marking 23rd Anniversary Of Pan Am Lockerbie Bombing

ARLINGTON, VA - DECEMBER 21: John S. Pistole (L), Administrator of the Transportation Security Administration, and John O. Brennan (C), White House counterterrorism advisor, and others listen during a memorial service for the Pan Am Flight 103 Lockerbie bombing at Arlington National Cemetery December 21, 2011 in Arlington, Virginia. Attorney General Eric H. Holder Jr. and others attended the service at the Flight 103 memorial to commemorate the 23rd anniversary of the bombing of Pan Am Flight 103 over Lockerbie, Scotland by Libyan terrorists. (Photo by Brendan Smialowski/Getty Images)