Protestors Push Police Vehicle At 1968 Democratic National Convention - from our story 'The Prime Movers: Iggy The Iguana, White Panthers And The MC5'

1967: Heavy metal gratings which failed to protect shop windows during the race riots in Detroit. The rioters later burned the shops they had looted. (Photo by Three Lions/Getty Images)

1967: Heavy metal gratings which failed to protect shop windows during the race riots in Detroit. The rioters later burned the shops they had looted. (Photo by Three Lions/Getty Images)

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