Rene Maes sits on a snow covered bench seat at Meridian Hill Park Washington, Saturday, Feb. 6, 2010. (AP Photo/Pablo Martinez Monsivais)

Martyn Griffen, 24, uses old artwork as a makeshift shield as he participates in a snowball fight at Meridian Hill Park in Washington, Saturday, Feb. 6, 2010. (AP Photo/Pablo Martinez Monsivais)