This is a schlieren image from a high-speed video of a .223 projectile in-flight. The color has been removed from the original image, the black and white has been inverted, and a sharp filter has been applied. The image exposure is 1 microsecond. This image was captured by Nathan Boor of Aimed Research on May 30, 2013 with a Vision Research Phantom v12.1 high-speed camera.