This B1 bomber was photographed at the Dayton, Ohio air show in 1996. Note the areas of condensation forming above and below the wings. This was taken during a high speed pass, on a very hot, humid day. The moisture condenses out of the air as the air cools while passing over (and under) the wings. I suspect, but cannot verify, that the local airspeed around these parts of the wings and the engine inlets was supersonic, and the localized shock waves contributed to the condensation. These cloudy areas traveled with the plane as it continued on past the crowd.
