August 20, 2019 5:10 pm Why LA's Notorious Smog Is Making a Comeback Los Angeles has experienced a “smog siege” this summer, with 57 straight days of unhealthy air. David Biggar and Anthony Yanez report for the NBC4 News at 4 p.m. on Tuesday, Aug. 20, 2019. US & World Videos 0:57 Man caught throwing rocks at drivers on 110 Freeway 0:29 Video captures patrol SUV rollover crash in Santa Clarita 2:01 Co-worker of Johnny Wactor shares details about final moments with actor 2:23 Hidden camera found outside Garden Grove home 5:29 How LA Union Station was built after forcing out Chinese immigrants
