December 15, 2015 7:00 pm LAUSD Could Have Difficulty Physically Clearing All Schools of Threat Law enforcement sources say it will be difficult to clear all LAUSD schools thoroughly in just one day. Jenna Susko reports for the NBC4 News at 5 and 6 p.m. on Dec. 15, 2015. US & World Videos 6:17 Workers' comp claim denied after nurse's coworkers fail to give CPR 3:37 Customers sue National General after claims denied 3:55 Unhoused Angelenos say the city is shuffling them around 2:41 Safety and staffing concerns within LA County Probation Department 2:22 Man arrested in fatal Metro stabbing was previously arrested for transit system attacks