Imagine this: the streets of Port-au-Prince, Haiti—Cite Soleil, to be exact. A slum of seemingly infinite size and unimaginable poverty. Dusty, litter-lined streets with scantily clad people aimlessly milling about. Children scampering in grimy clothes, perhaps a teeshirt or shorts, no diapers whatsoever, and shoes a rarity. The air is hot and muggy, with the scent of unidentifiable debris and …