BBC Culture has launched a new series of video profiles about "The Photos That Changed History." The first features Ian Berry, who was the only the only photographer present at the Sharpeville massacre in South Africa on March 21, 1960.

Sixty-nine men, women and children died and at least 180 were injured. In Berry's photograph, the protesters are running towards him as the police shoot them in their backs. Thanks to this poignant photograph, the massacre at Sharpeville prompted international condemnation — the event is now marked as a national holiday, Human Rights Day. Berry went on to photograph South Africa over the next four decades.

In the video, Berry describes his experience as a photographer: "You look for the interplay of relationships, gestures. You wait for things to come together, and it all has to happen in a hundredth of a second. Because very frequently you don't have another chance."

Berry shares two of his other photographs and concludes with one which he saw as indicating a sign of the end of apartheid in South Africa.