CNN CNN Newsroom January 12, 2014 20:40:00
When u.s. troops left iraq they had shattered al qaeda. two years later al qaeda backed fighters back stronger than ever. just today more than 20 people killed and dozens others wounded in car bombings and shootings. it's disturbing news for soldiers who fought to rid iraq of militants there. martin savidge has more. >> reporter: americans fought for fallujah not once but twice. >> that rocket whistle coming and the explosion was just massive. >> reporter: house to house, street by street. >> the flak jacket, seeing the whites of their eyes. >> i think mortars are rockets hit an ammo dump so i...