Air-to-air photography is the art of photographing aircraft in the air, by using another aircraft as a photo platform. It is especially popular among military aircraft photographers and aerobatic pilots flying at air shows. Air-to-air photography requires special skills and experience, as the photo platform and target aircraft often fly low level while under moderate to high G-forces. Looking through his camera, the photographer usually sits looking sideways while the aircraft manoeuvres through the sky, often resulting in airsickness and making air-to-air photography even more challenging.