It's one of the most confronting photographs in American history.
The bloated and scarred corpse of 14-year-old Emmett Till – a Black teen who was abducted, beaten, shot in the head and dumped in a Mississippi river in 1955 by two white men – is laid out in front of his mother, her head turned in grief while her partner stares down the lens, his expression a mixture of sadness and accusation.
