Thousands of nurses at more than 30 Sutter Health and Kaiser Permanente hospitals in Northern California will walk off the job Thursday in what union officials say will be the nation's largest-ever nurses' strike. More than 23,000 nurses represented by the powerful California Nurses Association – including 17,000 from Kaiser hospitals – are expected to honor the walkout, primarily in the Bay Area but also at Kaiser's Sacramento-area hospitals. Kaiser officials said they are prepared "to provide high-quality health care and service" during the strike. The massive one-day strike, engineered by the CNA –