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Mark Salvatore, left, a homeless outreach nurse with the Veterans Administration, talks with homeless Vietnam War veteran William Joyce in Philadelphia. Veterans make up 11 percent of U.S. population. (Matt Rourke, Associated Press)
Matt Rourke, Associated Press
Mark Salvatore, left, a homeless outreach nurse with the Veterans Administration, talks with homeless Vietnam War veteran William Joyce in Philadelphia. Veterans make up 11 percent of U.S. population.