A girl sits on a tractor in the Mennonite community of Buenos Aires, Janos, Chihuahua, Mexico September 29, 2012.?Mennonites generally finish school by the age of 12.?It is not uncommon to see a child younger than 10 operating a tractor or driving a horse-drawn buggy on the white, dusty roads within the community. REUTERS/Jose Luis Gonzalez