AVE6321637: United States, c.1950: Elementary school students eat lunch at tables, a student practices ducking and covering under a lunch table while other students look on, an older student directs the other students' attention to the boy's technique / Bridgeman Images

AVE6321643: 1980s: Chrysler Corporation logo / Bridgeman Images

AVE6321646: 1980s: Text on screen / Bridgeman Images

AVE6321664: United States, 1940s: Man on porch swats at mosquitoes / Bridgeman Images

AVE6321679: United States, 1940s: Man sprays pesticide around campsite, man fishing in background / Bridgeman Images

AVE6321991: Men Meet Over a Lathe in a Factory / Bridgeman Images

AVE6322018: United States, 1950s: man shaking his head, man walking over to another man, close up of man talking / Bridgeman Images

AVE6322048: United States, 1950s: Crowd walking through circus / Bridgeman Images

AVE6322051: United States, 1950s: Elephants walk in front of circus tents / Bridgeman Images

AVE6322060: United States, 1950s: Performers dressed as cartoon characters at circus / Bridgeman Images

AVE6322072: United States, 1950s: Acrobat does balancing trick at circus / Bridgeman Images

AVE6322078: United States, 1950s: Views of crowd getting up, walking out of circus / Bridgeman Images

AVE6322118: 1940s: Rocky shore of island / Bridgeman Images

AVE6322166: 1980s: A crowded room with people sitting behind a control board / Bridgeman Images

AVE6322172: 1980s: Two men discuss the design of an airplane model / Bridgeman Images

AVE6319474: United States, 1950s: Pan of garbage in alley, tilt up building / Bridgeman Images

AVE6319480: United States, 1950s: Pan of derelict street, damaged buildings / Bridgeman Images

AVE6319498: United States, 1950s: Dwight D Eisenhower speaks at press conference / Bridgeman Images

AVE6319524: United States, 1950s: Henry Ford tests quadra cycle on streets at night / Bridgeman Images

AVE6319548: United States, 1950s: bicycle wheels / Bridgeman Images

AVE6319560: United States, 1950s: Ford workers on assembly line / Bridgeman Images

AVE6319566: United States, 1950s: car reverses on narrow track / Bridgeman Images

AVE6319581: United States, 1950s: Motorbikes try to stop Ford motor Car in movie / Bridgeman Images

AVE6319602: United States, 1950s: Old Ford cars turned in for new ones / Bridgeman Images

AVE6319647: Man Presses Machinery Buttons / Bridgeman Images

AVE6319653: Russian Women in Space / Bridgeman Images

AVE6319689: Sally Ride Inside Flight Simulator / Bridgeman Images

AVE6319707: 1920s: Large street crowd cheers and waves hats / Bridgeman Images

AVE6319710: 1920s: Men guide, man pumps wings of bicycle machine / Bridgeman Images

AVE6319722: 1950s: Rocket launches at night, sends smoke in wide radius, exploding / Bridgeman Images

AVE6319752: 1960s: Rocket in water / Bridgeman Images

AVE6319768: A baker weighs loaves of dough before they are put into the rounding machine in a bakery / Bridgeman Images

AVE6319774: Two bakers prepare loaves of broad for baking / Bridgeman Images

AVE6319783: Dough in pans are placed into a proof box allowing dough to rise / Bridgeman Images

AVE6322181: USA, 1950s: Animation to show the movement of nutrients from the blood stream into the cells / Bridgeman Images

AVE6322187: 1980s: An airplane flies / Bridgeman Images