Rebecca Letven is the Cambodia country director for the UK based Mines Advisory Group, or MAG, a non-governmental organization that works to clear explosives and return land to communities. These deadly remnants of the Cambodian civil war were planted in the late 1960s and early 70s by both the genocidal Khmer Rouge and the Cambodian Vietnamese forces. They also include thousands of unexploded bombs dropped by the United States as part of the Vietnam war. Most of the minefields are in rural areas, where close to 80% of Cambodians live and depend on the land for farming or other natural resources.