In El Salvador's capital, San Salvador, people drive around with their car windows closed to avoid petty theft. But when they enter neighborhoods controlled by gangs, they keep their car windows open, to show their faces. That way the gangs know they're not an enemy.
In the center of one such neighborhood, known as La Dina, a tiny Baptist church sits on a narrow street. In a neighborhood notorious for violence, it is the one place gangs leave alone.