MEXICO CITY — Reputed drug kingpin Joaquin "El Chapo" Guzman has launched a bloody offensive to control drug smuggling along the entire U.S.-Mexico border, Attorney General Daniel Cabeza de Vaca said today. Mexico's top law enforcement official said Guzman was behind a wave of violence that has killed hundreds of suspected smugglers, hit men, police, soldiers and civilians along the 2,000-mile border. "Definitely, he is the most active man in his group. He is trying to fight for the border corridors, trying to control places like Culiacan just like the rest of the communities of Sinaloa (state), and the border...