Especially for small items that you can't find anywhere, it can be useful, but for most items, sourcing locally does several things, including supporting the local economy, the local infrastructure.
In some of our programming, we try to do what we call cash programming, which means we're supporting.... I remember when I was in Haiti—I was there within 48 hours of the earthquake—one of our projects involved employing local people in a cash-based program to remove rubble from a particular site. Then we again paid cash to erect camps. This local cash injection goes a long way. It starts the ball rolling.