Park police horses wear face protection during a raid on the Occupy encampment at McPherson Square, Washington, D.C., Saturday, Feb. 4, 2012. Police and protesters clashed throughout the day as tents and camping equipment were removed by park police and maintenance officials, some dressed in hazmat suits.(Andrew Harnik/The Washington Times)

Photo by: Andrew Harnik

Park police horses wear face protection during a raid on the Occupy encampment at McPherson Square, Washington, D.C., Saturday, Feb. 4, 2012. Police and protesters clashed throughout the day as tents and camping equipment were removed by park police and maintenance officials, some dressed in hazmat suits.(Andrew Harnik/The Washington Times)