Civilian defense. Extremely valuable in battling incendiary bombs is the stirrup pump operated by three, or in cases of emergency, two men. The volunteer worker closest to the camera is pumping water from the bucket on the reef, while the man barely visible in the center replenishes the water supply from another bucket. The third volunteer, holding the nozzle, which may be adjusted to provide either a spray or a steady stream of water, is spraying magnesium incendiary bomb and the area around it. New improved pumps are being produced in American factories