@wallstreetjournal: An NBC News helicopter crashed in a Los Angeles neighborhood, killing at least three people while covering a deadly collision involving a Metro bus. The aircraft came down in a parking lot near a self-storage facility in Chatsworth, a community in Los Angeles’s San Fernando Valley, according to the Los Angeles Fire Department. The helicopter was operated by Angel City Air and was providing coverage for NBC Los Angeles and its Spanish-language sister station, Telemundo 52. Anchor Colleen Williams later confirmed on air that News Chopper 4 had crashed shortly before 7 p.m. local time Tuesday in Chatsworth, roughly 25 miles northwest of downtown Los Angeles. The National Transportation Safety Board and the Federal Aviation Administration are set to investigate the incident.