I can't recommend enough watching the The Salt of the Earth[0] documentary. It's not only an impactful review of Salgado's career but also a great (and visual) way to expand our knowledge about the world and its recent history. [0] https://www.imdb.com/title/tt3674140/
Yes, the segment in which he comments about his experience in Africa during the ethnic conflicts is VERY impactful. This movie is a must see for any human being.
This segment is the one I cannot forget too. Especially where Salgado speaks about how he was sick after he returned from Africa. When you see his face when he says he was sick but not in a contagious way you know exactly what he means.
I also found the scenes, where you can see Salgado's face close-up and frontal while he looks at his photos, very strong. I read somewhere the scenes were filmed through a teleprompter which is an interesting artistic technique.