Between Dec. 11 and 13, 1981, soldiers from the Atlacatl battalion, a Salvadoran death squad trained at the U.S. military’s School of Americas, massacred almost all the residents of El Mozote, who had been accused of being sympathetic to the cause of left-wing rebels. Up to 1,200 victims, mostly women and children, were killed in the bloody attack that destroyed the town. Today, 35 years later, the families of victims are still searching for justice.