Michael Williamson/ The Washington Post
GREENEVILLE, TN - JUNE 28: Erica Johnson (age 2) jumps for joy and yells, "The bus is here, the bus is here!" as the lunch bus arrives. Scores of poor children are served lunch each weekday in the areas around Greeneville, TN as "The Lunch Express" bus visits trailer parks and housing developments in the summertime. The summer lunch bus fills the gap for impoverished families who rely on the free lunch program during the school year and bear the burden of finding ways to make up for the loss of free lunches when school is out.