LOS ANGELES, CA - DECEMBER 15: Police converge on Edward R. Roybal Learning Center as all Los Angeles city school are shut down after receiving a threat on December 15, 2015 in Los Angeles, California. A bomb threat against LAUSD schools was sent to various members of the Los Angeles school board late last night, according to LAPD Chief Charlie Beck. Local authorities immediately notified the FBI. (Photo by David McNew/Getty Images)
