travel April 19, 2022 6:44 am WATCH: The Moment Mask Mandate Ended Aboard Flights Videos posted to social media show the moment the mask mandate for flights was lifted. US & World Videos 2:19 San Francisco barbershop struggles to stay open after pandemic 0:51 Alameda County using dogs to detect COVID 3:57 Interview: Doctor's perspective on COVID 4 years after shutdown started 2:27 Marking 4 years since COVID-19 shut down the Bay Area 2:09 CDC updates COVID isolation guidelines