WASHINGTON — Gun shots rang out in a House office basement Friday as a Capitol police officer fired a semiautomatic pistol into the chest of a man-sized paper silhouette. Had the paper target been a real victim, and Capitol Police Sgt. William P. Siko a criminal, investigators might have found enough evidence for a conviction in the bullet cartridges left at the scene, gun control advocates said. Siko helped demonstrate for lawmakers a technique called... (GunPolicy.org)