LOS ANGELES (AP) - The latest on the closure of Los Angeles Unified School District schools due to a threat (all times local): 9:40 a.m. New York City officials say they and many cities across the country received the same threat that closed the Los Angeles school system. Mayor Bill de Blasio told reporters Tuesday that the threat came in the form of a "generic" email and that New York officials quickly concluded that it wasn't credible. Los Angeles Unified School District officials say they closed all of the system's more than 900 schools and 187 public charter schools as...