AVE6326336: United States, 1960s: Police officers approach an angry mob to stop its protesting and take their agitator into custody / Bridgeman Images

AVE6326353: United States, 1960s: Grenades thrown by police officers produce smoke use to confuse an angry mob / Bridgeman Images

AVE6326356: United States, 1960s: Rioters run away, confused, as tear gas strikes them / Bridgeman Images

AVE6326375: United States, 1960s: A police officer shoots a tear gas projectile using a gas gun to cover a group of protesters in white smoke / Bridgeman Images

AVE6326378: United States, 1960s: A tear gas grenade goes off behind protesters as police officers start approaching them in a formation / Bridgeman Images

AVE6326409: United States, 1960s: audience listen to speaker's talk / Bridgeman Images

AVE6326424: United States, 1960s: tax legislation document / Bridgeman Images

AVE6326425: 1970s: A child writes a letter / Bridgeman Images

AVE6326428: United States, 1960s: man nods at agent and shakes hand / Bridgeman Images

AVE6326429: 1970s: A boy licks an envelope flap and closes it / Bridgeman Images

AVE6326430: United States, 1960s: lady gives papers to man at desk / Bridgeman Images

AVE6326432: United States, 1960s: lady pushes cart in grocery store / Bridgeman Images

AVE6326440: 1970s: Stylized animation / Bridgeman Images

AVE6326442: United States, 1960s: men feed cows on farm / Bridgeman Images

AVE6326444: United States, 1960s: men sit in large boardroom meeting / Bridgeman Images

AVE6326451: United States, 1960s: men talk at counter / Bridgeman Images

AVE6326465: 1970s: Mail is automatically sorted by a machine at the post office / Bridgeman Images

AVE6326469: 1970s: Mail is automatically sorted by a machine at the post office / Bridgeman Images

AVE6326475: United States, 1960s: view across water to city buildings on horizon / Bridgeman Images

AVE6326481: United States, 1960s: municipal buildings in city / Bridgeman Images

AVE6326482: United States, 1960s: machines types on paper / Bridgeman Images

AVE6326485: United States, 1960s: boats on water / Bridgeman Images

AVE6326490: United States, 1960s: lady opens mail box in hedge / Bridgeman Images

AVE6326492: 1970s: A boy talks to a mailman on his route / Bridgeman Images

AVE6326495: United States, 1960s: boy with parcel walks towards building / Bridgeman Images

AVE6326498: 1970s: Stylized animation of dog chasing a mailman / Bridgeman Images

AVE6326526: 1970s: Garbage can and man / Bridgeman Images

AVE6326530: 1970s: Man lifts garbage can, carries to side of road / Bridgeman Images

AVE6326532: 1970s: Garbage cans and lids in a row / Bridgeman Images

AVE6326535: 1970s: Man sets bag of trash next to railing / Bridgeman Images

AVE6326772: United States, 1960s: Bundles of newspapers prepared and delivered to newstand. / Bridgeman Images

AVE6326782: United States, 1960s: Worker taking one of many printing plates and mounts it for printing onto paper. / Bridgeman Images

AVE6326783: United States, 1960s: Rolls of newsprint being rolled to a machine where they are loaded for printing. / Bridgeman Images

AVE6326792: UNITED STATES 1970s – The increased demand for quick food is answered by the speed of delivery of fast food services even though it is bad for the digestive system. / Bridgeman Images

AVE6326799: United States, 1960s: A typesetter places the appropriate characters together to form words to be used as a plate. / Bridgeman Images

AVE6326810: United States, 1960s: Working writers at the office pass their articles to be proofread by editor. / Bridgeman Images