An acrobatic pilot crashed a vintage era plane during a preshow practice Friday afternoon at Oceana Naval Air Station, killing the veteran flier and shocking several hundred fans and students gathered for the opening of the base's annual air show. Jan Wildbergh, a veteran pilot for the Geico Skytypers, was killed when his silver and red World War II SNJ-2 plane dropped suddenly during a final maneuver, crashed into a grass strip beside a runway at 12:25 p.m. and burst into flames. It's the first casualty in the more than six decades of air shows at the Virginia Beach base,...