You read that right. Rats who save lives. Let me back up a bit. Cambodia has a tragic history of conflict in the 20th century. As a result, there are estimated to be between 4 million to 6 million unexploded landmines and unexploded missils in the country. Most of these are in rural areas where the expanding population is starting to farm and build. The result is a dangerous situation for all -- especially children. Landmines were placed in Cambodia from 1967 to 1998 -- during the Cambodian civil war, the bloody reign of the Khmer Rouge (post on that…