On the morning of November 4, 2019, an unassuming caravan of women and children was ambushed by masked gunmen on a desolate stretch of road in northern Mexico controlled by the Sinaloa drug cartel. Firing semi-automatic weapons, the attackers killed nine people and gravely injured five more. The victims were members of the LeBaron and La Mora communities--fundamentalist Mormons whose forebears broke from the LDS Church and settled in Mexico when...