Nnaemeka Alozie, campaign manager for California congressional candidate David Steinman, poured milk on his face Tuesday after being pepper sprayed during the incident at Santa Monica College. Courtesy of David Steinman/AP hide caption

itoggle caption Courtesy of David Steinman/AP

In this image made from video, a police officer uses pepper spray as he walks down a line of Occupy demonstrators sitting on the ground at the University of California, Davis on Friday, Nov. 18, 2011. Thomas K. Fowler/AP hide caption

itoggle caption Thomas K. Fowler/AP

University of California Davis Chancellor Linda P.B. Katehi walked through a three-block long group of silent protesters Friday night after campus police used pepper spray on some protesters earlier in the day. There have been calls for her resignation. http://www.youtube.com/lhfang86 hide caption

itoggle caption http://www.youtube.com/lhfang86