Cambodia's Khmer Rouge was responsible for the deaths of an estimated two million people from 1975-79, and millions more were left with deep mental and physical scars.
Sin Son was one of them.
He lost several of his relatives in the mass slaughter but one very special companion, an elephant named Sambo, survived.
Sin Son told Al Jazeera of his reunion with his childhood friend after many years apart.
Source: Al Jazeera