Alex Williamson, 8, is one of 17 million children who live in U.S. households where getting enough food is a challenge. Sometimes it's hard for the poor to eat healthy because it costs more. Pam Fessler/NPR hide caption

itoggle caption Pam Fessler/NPR

Volunteers sorted through food last fall as they stocked shelves at the San Francisco Food Bank in California. As the U.S. continues to struggle through the recession and unemployment is at record highs, food banks are seeing an increased demand. Justin Sullivan/Getty Images hide caption

itoggle caption Justin Sullivan/Getty Images

Nga Thi Buscall, 60, slept on the streets of Washington, D.C., last winter. New numbers from the Department of Housing and Urban Development show that the number of homeless people actually dipped last year -- although more families were living on the street. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

Josh Mendoza bounced around 14 different group homes during his two years in foster care. Now 18, he has aged out of foster care and recently moved into his own apartment. Melissa Lyttle for NPR hide caption

itoggle caption Melissa Lyttle for NPR