Agents from the FBI and ATF investigate the scene behind the Century 16 theater in Aurora, Colo., following a shooting on Friday, July 20, 2012. A gunman wearing a gas mask set off an unknown gas and fired into the crowded movie theater killing 12 people and injuring at least 50 others, authorities said. (AP Photo/The Denver Post, AAron Ontiveroz) TV, INTERNET AND MAGAZINES CALL FOR RATES AND TERMS
