By MARK STEVENSON, Associated Press Writer MEXICO CITY - The bodies of 12 men killed by hitmen believed linked to drug gangs were found Tuesday in the northern state of Sinaloa, in what appears to be one of the deadliest one-day tolls in violent drug battles in recent years. The victims — all apparently executed with close-range gunshots — turned up in clumps along an 80-mile stretch of highway between the state capital, Culiacan, and the well-known beach resort of Mazatlan. "Given the type of weapons used, the type of people (killed) and the objects found at the scene, we...