AdvertisementOmicron variant spreads to North America, Australia and more of EuropeUpdated November 28, 2021Deepa ShivaramfacebookEmailPresident Biden speaks to media as he arrives on Air Force One at Andrews Air Force Base, Md., on Sunday after returning from Nantucket, Mass., after spending the Thanksgiving holiday there. (AP)This article was originally published on November 28, 2021.