INVESTIGATIVE August 15, 2022 7:27 pm The Impact of Heat on BART Trains NBC Bay Area’s Investigative Unit learned that BART had no formal policy in place the day that a train partially derailed due to high heat. Jaxon Van Derbeken reports. US & World Videos 3:30 Superintendent calling for investigation into Antioch Unified's handling of bullying claims 3:48 Antioch school official calls for superintendent resignation after KNTV worker bullying report 7:25 Antioch Unified boss ‘bully' puts worker's desk on roof, employees say 2:38 San Francisco vacancies reach all-time high amid signs of a market shift 2:49 Newly-released videos show Napa County Sheriff's Deputy shooting armed suspect in the back