Aid agencies are overhauling the food distribution system in Haiti to prevent a repeat of riots and free-for-alls seen in parts of the capital, Port Au Prince.
The World Food Program has introduced the measures to stop young men who have been taking other people's supplies.
Hundreds of thousands of people have been forced to stay in makeshift camps across the country, with limited access to water and no sanitation.
Captain Jeffrey Sabala is with the US 82nd Airborne divison at Petionville Club, which is now home to an estimated 50,000 people.