This is am image of a protest which was led by Martin Luther King Jr., a group of civil rights demonstrators march from Selma to Montgomery to fight for black suffrage. What made this image stand out is the white paint this young man put on his face. And the black and white contrast made a very significant effect, and expressed the situation of racism at that time very well.
Bruce Davidson, 1965, Alabama, https://pro.magnumphotos.com/C.aspx?VP3=CMS3&VF=MAGO31_4&VBID=24PVHKKA2L9HD&IID=2K1HRGPD1IXK&PN=2