WASHINGTON — Wal-Mart, the nation's largest seller of firearms, announced Monday it will toughen rules for gun sales, from storing video of purchases to creating an internal log of which guns they sell that are later used in crimes. J.P. Suarez, the chief compliance officer for Wal-Mart Stores Inc., appeared with outspoken gun control advocate Mayor Michael Bloomberg of New York to announce the changes at a gathering of Bloomberg's group Mayors Against Illegal... (GunPolicy.org)