A protester walks away after placing a smoke device on the ground in front of police officers during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police on Wednesday, May 1, 2013, in downtown Seattle. (AP Photo/Ted S. Warren)

Photo by: Ted S. Warren

A protester walks away after placing a smoke device on the ground in front of police officers during a May Day march that began as an anti-capitalism protest and turned into demonstrators clashing with police on Wednesday, May 1, 2013, in downtown Seattle. (AP Photo/Ted S. Warren)