Thousands of Kaiser Permanente healthcare workers began a three-day strike Wednesday in what their union says is the largest action of its type in U.S. history after contract negotiations failed to produce an agreement. Outside Kaiser's Zion Medical center, employees carried signs and wore blue t-shirts that read" Stronger Together." Several drivers honked their support as they drove by the cheering crowd. MORE: https://www.cbs8.com/article/news/local/thousands-of-kaiser-employees-in-san-diego-hit-picket-line/509-a83049a9-c801-449f-bc66-d374c8a3e0ed