Seventy-five thousand healthcare workers with Kaiser Permanente are walking off the job in a major strike that will run through the end of this week. Talks have failed to yield a new agreement as workers seek higher pay, better staffing, and improvements in their pension plans and other benefits. The strike would affect Kaiser workers in California, Oregon, Washington, Colorado, Virginia and Washington, D.C. It’s the largest strike of healthcare workers in U.S. history.