SACRAMENTO — Using undercover pictures and video, a UC Davis School of Medicine report says that gun shows are an important source for guns used by criminals. Dr. Garen Wintemute of the school's Violence Prevention Research Program went to 78 gun shows throughout the country documenting the private sales of guns at gun shows. His pictures and videos show men walking gun show floors with signs around their necks advertising the sale of weapons which are carried by... (GunPolicy.org)