Nicholas Simmons in the photo that helped his family find him. Jacquelyn Martin/AP hide caption

itoggle caption Jacquelyn Martin/AP

Martha Castro lives on the streets in Los Angeles' Skid Row neighborhood. She's still resistant to the idea that she can now get health coverage because of California's expansion of Medicaid. Anna Gorman/Kaiser Health News hide caption

itoggle caption Anna Gorman/Kaiser Health News

A homeless man sleeps under an American flag blanket on a park bench in New York City. New U.S. data reports a drop in the number of homeless people — but not in New York and other states. Spencer Platt/Getty Images hide caption

itoggle caption Spencer Platt/Getty Images

A homeless man collects cans on Waikiki Beach in 2010 in Honolulu. Under a new pilot program, some homeless people will get help from the state to reunite with relatives on the mainland. Marco Garcia/AP hide caption

itoggle caption Marco Garcia/AP

Jacqueline Syra has been living in the La Piste camp for three years. She says she has no idea when she will be able to leave. David Gilkey/NPR hide caption

itoggle caption David Gilkey/NPR

The photo that touched many hearts: New York City Police Officer Lawrence DePrimo gives a shoeless man a pair of boots on a frigid night last month. That man was later identified as 54-year-old Jeffrey Hillman. Jennifer Foster/NYPD via Facebook hide caption

itoggle caption Jennifer Foster/NYPD via Facebook

Volunteers distribute food outside a Philadelphia Department of Public Health hearing in March on rules banning outdoor food distribution. Alex Brandon/AP hide caption

itoggle caption Alex Brandon/AP

The Colorado Coalition for the Homeless runs the Stout Street Clinic in Denver, helped Dale Miller get a CT scan. Colorado Coalition for the Homeless hide caption

itoggle caption Colorado Coalition for the Homeless