Sir Edmund Hillary and Tenzing Norgay, Everest; ca. 1953
According to this Swedish source, they are about to start the climb to camp 9, which was their last camp before heading for the summit.
The picture is taken at camp 8, at the South Col, which is at about 8000 meters. The previous summit attempt by Evans and Bourdillon failed, so Hillary and Tenzing wanted to set a higher camp and try to get to the summit from there.