US CDC announces that mask-wearing will be required on all public transportation beginning Monday night.
https://www.nbcnews.com/news/us-news/cdc-mandates-masks-public-transportation-n1256249?cid=sm_npd_nn_fb_ma
https://www.nbcnews.com/news/us-news/cdc-mandates-masks-public-transportation-n1256249?cid=sm_npd_nn_fb_ma