AVE6326457: 1970s: A boy and his mother at the post office / Bridgeman Images

AVE6326522: United States, 1960s: people sit in large meeting hall / Bridgeman Images

AVE6326789: UNITED STATES 1970s – The All-American meal represented by a burger, fries, and soda drink. / Bridgeman Images

AVE6326795: UNITED STATES 1970s – Young adults pour and drink milk, a good source of nutrients. / Bridgeman Images

AVE6326816: United States, 1960s: A secretary compares the acquired plates and the turnout of printing of each plate. / Bridgeman Images

AVE6326860: 1930s: Several children raise their hands in classroom / Bridgeman Images

AVE6326863: 1950s: Woman sitting in backyard / Bridgeman Images

AVE6326881: 1950s: Two men speak / Bridgeman Images

AVE6326899: 1950s: People secure boats in marina / Bridgeman Images

AVE6326905: 1930s: Students sit and look at professor who writes on a board / Bridgeman Images

AVE6326911: United States, 1960s: students protest by college / Bridgeman Images

AVE6326914: United States, 1960s: students walk during strike at college / Bridgeman Images

AVE6326515: United States, 1960s: boy leaves bank building / Bridgeman Images

AVE6326524: 1970s: Garbage men pour trash bags into compactor / Bridgeman Images

AVE6326797: United States, 1960s: Newspaper, rolled through the mill, is cut and bound. / Bridgeman Images

AVE6327047: United States, 1970s: A woman listens intently as a fortune teller explains her readings / Bridgeman Images

AVE6326806: United States, 1960s: Man pours orange ink into the newspaper printing press to be used for printing. / Bridgeman Images

AVE6326228: 1970s: Man talking on diving station / Bridgeman Images

AVE6326230: 1970s: Books on shelf / Bridgeman Images

AVE6326246: 1970s: View of diving station from ship / Bridgeman Images

AVE6326245: 1970s: Close up of gauge / Bridgeman Images

AVE6326249: 1970s: Men on diving station pulling rope / Bridgeman Images

AVE6326263: 1970s: Men look at plans around table, zoom in on man talking / Bridgeman Images

AVE6326266: 1970s: Underwater bubbles / Bridgeman Images

AVE6326226: 1970s: Underwater view, underside of diving station / Bridgeman Images

AVE6326345: United States, 1960s: An angry crowd retreats backward as police officers use their batons / Bridgeman Images

AVE6326241: India, c.1930: A man leads Gandhi down a road while a few onlookers bow to him / Bridgeman Images

AVE6326250: 1970s: High angle view of diving station / Bridgeman Images

AVE6326470: United States, 1960s: man in car reaches through window / Bridgeman Images

AVE6328075: United States, 1960s: Stars in space / Bridgeman Images

AVE6328037: United States, 1940s: Teenagers talking next to lockers / Bridgeman Images

AVE6328105: United States, 1960s: upside down piggy bank shaken / Bridgeman Images

AVE6327709: United States, 1950s: Dr. Goddard, a pioneer in rocketry, attempts to test his parachute in a field / Bridgeman Images

AVE6328133: Europe, 1940s: sign for village / Bridgeman Images

AVE6328165: Europe, 1940s: baby cries in crib / Bridgeman Images

AVE6327796: America, c.1990s: Extreme long shot from below the space shuttle Endeavour as it soars into the sky / Bridgeman Images