Bill Thomas Hardt (b. 1937, Chemnitz) is a German photographer who recorded the brutal scenes of Vietnam war.
“With images of the Vietnam War, he became known in the late 1960s worldwide. His pictures documented for the first time the horrors of this war, especially in the faces of the children he has photographed and which are a dominant theme of many of his photographic reports since then. “ [Source]
Since 1987 he has often represented the UNO and child welfare organization, UNICEF.