Just down the street from where I live is a little do-nut shop operated by a woman who walked out of the killing fields with her family. She said of the 150 or so that started out, less than 30 survived. Most were killed walking through mine fields and the rest by the kmer rouge (her family escaped into a jungle and hid from them when they saw the front of the group being caught.
People should see the movie The Killing Fields.