In Death Valley National Park, north of Barstow, California, is Rainbow Canyon. It’s not especially remarkable, just one canyon in an area full of them, all but indistinguishable from its neighbors in an area populated mainly by snakes. But stand on one of the canyon tops for long enough and a fighter jet will suddenly roar into the valley below you, flying fast and very, very low. It will be visible for only a few seconds before it turns hard and disappears behind the next hill. But during those few moments, anyone with a camera has a brief chance to take a spectacular picture. Rainbow Canyon (or Star Wars Canyon, as some call it) is part of the R-2508 restricted airspace complex, host to a busy, low-level training route for combat aircraft.