Civil Rights U.S.A. pic: 30th March 1968. Memphis, Tennessee. Guardsmen with fixed bayonets in Beale Street, Memphis as black marchers stage a protest march. [Getty Images]

Civil Rights, U,S,A, pic: 30th March 1968, Memphis, Tennessee, Guardsmen with fixed bayonets in Beale Street, Memphis as black marchers stage a protest march (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images) — see more

Civil Rights, U,S,A, pic: 30th March 1968, Memphis, Tennessee, Guardsmen with fixed bayonets in Beale Street, Memphis as black marchers stage a protest march (Photo by Rolls Press/Popperfoto via Getty Images/Getty Images)

Popperfoto Rolls Press/Popperfoto