Five minutes after exposed film has been dropped by parachute from an army photographic plane, the finished prints can be handed to a dispatch rider and rushed to the field commander. This “blitz” photography depends upon a portable darkroom developed by the U. S. Army air corps at Wright Field, Dayton, O. Weighing only 50 pounds fully equipped, this unique darkroom is a tent supported by ribs which are inflated with compressed carbon dioxide gas from a flask about the size of a quart bottle. The operator spreads the tent on the ground, applies the flask to the valves of the “inner-tube” ribs, and up goes the darkroom. It has a light-sealed door, and its equipment is also light-sealed. The operator develops and prints the film in the dark. Special tanks, rollers and waterproof paper make drying unnecessary. By this speedy delivery, development and dispatch of aerial photos field commanders can direct fire at mechanized concentrations before they are out of range.