** CORRECTS TO TEC-9 ** A semi automatic TEC-9 gun is returned to a storage vault of recovered illegal firearms at the Bureau of Alchohol, Tobacco, Firearms and Explosives center in New York, Friday July 13, 2007. Each day the bureau use a combination of high tech science and conventional detective work to trace the life line of a firearm used to commit crimes. (AP Photo/Bebeto Matthews)