The threat of as many as 10,000 New York City nurses going on strike intensified Monday as members of the New York State Nurses Association rallied outside the Mount Sinai Hospital in East Harlem. The union announced that nurses at Montefiore Health System, Mount Sinai Health System, and New York-Presbyterian would strike starting at 6 a.m. on April 2nd if those hospital systems do not agree to hire enough staff to maintain minimum nurse-to-patient ratios that the union says are needed to ensure patient safety.