An AK47 rifle (L) and an American AR15 rifle confiscated by the Bureau of Alcohol Tobacco and Firearms (ATF) stand against a car door pierced by their rounds during a demonstration by the ATF of the firepower of weapons commonly used by criminals along the U.S.-Mexican border at the Ben Avery Shooting Range in Phoenix, Arizona, March 10, 2008. Picture taken March 10, 2008. This photo accompanies the WITNESS/GUNRUNNERS piece by Reuters journalist Tim Gaynor as he tells how he traced a Kalashnikov rifle bought in Arizona to a mining town in Mexico where it was used by a drug gang in a battle with police and troops that killed 23 people. REUTERS/Rick Scuteri (UNITED STATES)