Nearly 800 nurses, members of the Pennsylvania Association of Staff Nurses and Allied Professionals union, began a two-day strike Nov. 17 at St. Mary Medical Center in Langhorne, Pennsylvania, over inadequate staffing levels, patient safety and low wages. The union has been in negotiations over a year for their first contract. A strike has also been authorized at two major Philadelphia hospitals organized by the union, Einstein Medical Center and St. Christopher’s Hospital for Children.