AFRTS didn't run commercials, and PSAs were only run between programs, or during our live newscast. The films were shipped from base to base, via the 'Bicycle Network'. There were typically 13 stations, or ships in each network, and movies went around twice. We would get several cases of film each week. It was up to us to select the air times, but all of them had to be shipped to the next location at the end of the week. The worst was that damned Kinescope film, that was so thin that a strong breeze would snap it. Our film chain used a single camera, so the only electronics in the projector was the sound circuitry.