Official figures reveal that narco-violence made 2017 the deadliest year in Mexico's modern history. The grim total surpassed that of 2011, when the militarized drug war of then-President Felipe Calderón led to 22,409 homicides. A total of 23,101 homicide investigations were opened in the first 11 months of 2017, according to figures from the Governance Ministry, which has been tracking the yearly kill count back to 1997. (Map: CIA)