Air Quality July 5, 2023 7:05 am Fourth of July Fireworks Boom and Glow Through the Night in LA NewsChopper4 captured fireworks far and wide July 4, 2023 in Los Angeles. US & World Videos 0:29 Simi Valley woman stabbed to death in front of her children 1:19 Security guard stabbed on Metrolink train near Acton 1:34 Four year anniversary of Iskander brothers killed in Westlake 2:28 Police presence increased after wave of stabbings in Long Beach 1:17 Line Fire flare-up forces new evacuation in San Bernardino County