World War II-era black and white advertisement, 'Military Pyrotechnics,' for International Flare-Signal Division Of The Kilgore Manufacturing Company, showing an illustration of tanks, cargo ships and airplanes at the top, and a parachute gliding down on the left side, promoting the company's development of flares and signal equipment for land, air and sea, September 1942. It orginally appeared in 'Aviation, Vol. 42, No. 06,' published by McGraw-Hill Publishing Company. (Photo by Museum of Science and Industry, Chicago/Getty Images)
