A precision-flying demonstration by the Air Force's Thunderbirds highlights Saturday's open house and air show at Hill Air Force Base.

Flying red, white and blue F-16s, the demonstration team will put on a 40-minute aerial show from the Hill flight line beginning at 2:30 p.m., landing at 3:10 p.m.Saturday's open house is billed as the state's biggest free event put on by Utah's largest employer. The 1985 open house, the last one held at Hill, drew 206,000 visitors, and base officials anticipate a larger crowd this year.

The open house runs 9 a.m. to 5 p.m., with free admission and free parking. Visitors may enter through the south, southwest, and west gates.

In addition to the air show, the open house features a full schedule of entertainment by military bands, drill teams, other military and civilian aircraft flyovers, and numerous static aircraft displays, booths, souvenir and concession stands and a carnival.

In a departure from the base's normal security procedures, cameras are welcome, even along the flight line.

Civilian aircraft will be arriving between 6 and 9 a.m., with the gates open to the public at 9 a.m. The 15th Air Force Band will open the entertainment with a 9:15-10 a.m. concert.

The Air Force's newest addition to its aircraft inventory, the B-1 bomber, will arrive at 9:30 a.m., and the Air Force Academy Sabre Drill Team will perform at 9:45 a.m., followed in 15 minutes by the Special Delivery Skydivers drop.

The Academy Cadet Honor Guard is on at 10:10 a.m., followed at 10:20 a.m. by the Roy High School Drill Team and at 10:50 a.m. by the Aeromodelers demonstration. The Roy drill team is on again at 10:50 a.m.

At 11 a.m., a T-6 Texan demonstration begins in the air while the 15th Air Force Band plays on the ground. A working-dog demonstration by the Air Security Police runs 11:45 a.m. to noon, followed by an RF-4 Phantom flyby.

The Aeromodelers are back in the air at 12:05 p.m., the security-dog demonstration is repeated at 12:25 p.m., and the Caledonian Bagpipers play at 12:30 p.m.

The skydivers drop in again at 1 p.m., with the Academy Honor Guard on at 1:15 p.m. and the Academy Drill Team repeating at 1:30 p.m.

The Thunderbirds will open with a 2:10 p.m ground ceremony, starting their engines at 2:20 p.m. and performing in the air from 2:30-3:10 p.m.

The Aeromodelers are on at 3:30 p.m., with the band playing on the ground, and the T-6 Texan demonstration repeated at 4 p.m..