Carolyn Cole / Los Angeles Times
Firemen Jim Clark, center, and Matt Cobb visit one of the hundreds of makeshift tent encampments that have popped up across the city since the Jan. 12 earthquake. Before departing for Haiti, Clark scribbled a set of rules for himself: Be humble. You can´t save the whole world. Don´t promise anything you can´t deliver. The only difference between you and them is where you were born.