HOUSTON — Houston has become a firearms marketplace for Mexican drug cartels, according to federal law enforcement officials. Gangsters have spent millions in Texas on military-style weapons and ammunition that are being used in the cartels' ongoing clashes with Mexican police, government and citizens. Houston has emerged as a buyers' haven. "Our investigations show Houston is the top source for firearms going into Mexico, top source in the country," said J. Dewey... (GunPolicy.org)