SAN ANTONIO — Eleven "Mad Max" fans were arrested after alarming motorists as they made their way to a movie marathon in a theatrical convoy in which they surrounded a tanker truck armed with fake machine guns. ADVERTISEMENT As the group was headed to San Antonio from nearby Boerne Saturday morning, police received several calls from motorists who reported a "militia" surrounding a tanker truck, a police report states. Police charged nine people with obstruction of a highway and two others with possession of prohibited knives in addition to obstruction of a highway. One of the organizers of the convoy,...