AdvertisementCongress Probes ATF Role In Border Agent's DeathMay 05, 2011Carrie JohnsonfacebookEmailA U.S. Border Patrol agent walks past photos of slain fellow agent Brian Terry, a Marine Corps veteran, during a memorial service on Jan. 21, 2011, in Tucson. Terry was killed during a Dec. 14 shootout near the U.S.-Mexico border. Thousands of Border Patrol agents and law enforcement officers from across Arizona turned out for the memorial. (Getty Images)