Mexican President Felipe Calderón unleashed a war on drug cartels in 2006, and since that time, more than 23,000 have died.

This includes kids.

The war on cartels, according to journalist Charles Bowden,  has devolved into a bloody free-for-all for drug money. The players are difficult to identify. There seem to be no clear sides.

Which explains why some schools in Mexico now feel compelled to teach kids how to dodge bullets.