About 15,000 nurses are staging the largest nurses strike in New York City history on Monday after the deadline passed to a new contract between their union and five hospital systems. Nurses with the New York State Nurses Association are seeking minimum staffing ratios, higher wages and increased security at hospitals. The strike is affecting five major privately operated hospitals in the city: Mount Sinai Hospital, Mount Sinai Morningside, Mount Sinai West, Montefiore Einstein, and New York-Presbyterian...