You never know what you’ll find when you start digging.Myself, I’ve only ever uncovered some old toy cars and Star Wars action figures, but down in Arizona, researchers have uncovered what they believe is the oldest firearm in the U.S.—an ancient conquistador’s cannon.Cannon time @ TFB: Scientists Trying To Preserve Cannon From The Alamo Coaches Club Cannons: Flying Bowling Balls 18th Century Cannon technology being used in Syria Old Weapons & CANNON v.AR-500 Body Armor – FIGHT!