The California Capital Airshow will bring more than Thunderbirds, Raptors and historic warplanes to the Sacramento area. The show is expected to draw at least 70,000 spectators and an estimated $7.4 million to the local economy, which would be on par with last year. The fourth annual airshow will be held Sept. 12 and 13 at Mather Airport, the former U.S. Air Force base. Organizers decided to schedule the event in late summer after last year's show was held on a cold, blustery March weekend. This year, Air Force Week. will be held in various locations around Sacramento the week before the airshow. Pilots and airplane enthusiasts aren't the only movers and shakers behind the airshow. The