Homeless people sleep in the parking lot of the Presbyterian Church in Dallas, Texas November 7, 2007. This patch of pavement, which slowly filled on a crisp autumn evening as darkness fell, has become a microcosm of the U.S. homeless problem, from police efforts to clean up downtown cores to faith-based activism to address the issue. Picture taken November 7, 2007. Reuters Pictures logo Reuters Pictures 52 months ago

Homeless people sleep in the parking lot of the Presbyterian Church in Dallas, Texas November 7, 2007. This patch of pavement, which slowly filled on a crisp autumn evening as darkness fell, has become a microcosm of the U.S. homeless problem, from police efforts to clean up downtown cores to faith-based activism to address the issue. Picture taken November 7, 2007.