Fifty years ago the fall of Cambodia’s capital, Phnom Penh, to the Khmer Rouge sparked a modern-day genocide that saw millions murdered in just four years. Today, a group that was almost entirely destroyed in the bloodshed is working both in person and online to heal the wounds that are still keenly felt. Religious practice was effectively outlawed under the Khmer Rouge and Buddhist monks were viciously targeted by the regime. By the time the genocide came to an end all but 3,000, of the country's 60,000 monks had been murdered. Now, still seen as the heart of Cambodian society, they re being mobilised to spread a message of non-violence across the country.