Los Angeles’s decision to shut down 900 schools Tuesday is a reminder that disruptions to American cities' daily social and economic rhythms can be only a mouse-click away.
New York — After a “credible” bomb threat prompted officials to shut down Los Angeles’s sprawling public school system Tuesday, Superintendent Ramon Cortines explained that he wasn’t going to take any chances.
20:36 Officials thwart possible school shooting, 2 AR-15s found at teen's home: Sheriff30
08:02 California cops say 'disgruntled' student's school shooting plot thwarted28
17:55 Douglas High School will resume classes Feb. 27, less than two weeks after deadly mass shooting24
02:15 Florida school shooting suspect had access to 10 firearms, including AK-47 variant37