During the Vietnam War he was working in Phnom Penh, April 1975, when
Pol Pot 's Khmer Rouge were poised to take the city. He was imprisoned
in the French Embassy for a month with fellow journalists Sydney
Schanberg and Jon Swain. Their experience was the basis for
The Killing Fields (1984) ,
but Cameron was said to be so disgusted with the portrayal of events
that he asked for his 'consultant' credit to be removed from the
film.