CHICAGO - MARCH 20:  Students at Nettelhorst Elementary School, on lunch, dig into a salad bar in the school's lunchroom March 20, 2006 in Chicago, Illinois. U.S. Senator Dick Durbin (D-IL) stopped by the school to visit the new lunch program called, 'Cool Foods,' as part of the Healthy Schools Campaign. Nettelhorst is one of three Chicago public schools participating in the new lunch program offering salad bars.  (Photo by Tim Boyle/Getty Images)