More photos: Nurses on Strike!

What drove the nurses to this, the fifth in a series of strikes since last September, is Sutter management's demands for staff reductions that hinder nurses' ability to safely care for patients. Also at issue is Sutter's position on maternity leave for nurses, which management wants to reduce. Sutter also wants nurses to accept a contract that would require them to accept thousands of dollars a year in out-of-pocket costs for healthcare for themselves and their families. These, plus other management demands, brought nurses continue the strikes.

Sutter hired scab employees to keep the hospitals open. In Berkeley, Sutter shuttled them in to the medical facility in vans. Dozens of nurses marched to the entrance where the replacement nurses were entering; the protesting nurses faced off with a line of security.

To punish them, Sutter locked striking nurses out for four days.