MEXICO CITY — Mexican troops acting on information from U.S. officials took out drug kingpin Arturo Beltran Leyva in an assault that provided a rare victory for President Felipe Calderon but left a power vacuum that could lead to more violence. In a carefully executed attack, heavily armed Mexican marines quietly evacuated an upscale apartment complex in Cuernavaca Wednesday before some 200 troops stormed the building and demanded the surrender of Beltran Leyva, one of the world’s most brutal drug lords. Gunmen fired on the marines who then launched an attack that lasted nearly two hours. Nicknamed the “boss of ….Read More