The White House says a possible Ukraine invasion remains imminent as the president is promising major problems for Russia if that happens, Pfizer and BioNTech just started clinical trials for a vaccine made for the Omicron variant, British police are now investigating the birthday party Boris Johnson attended at the beginning of the pandemic while the rest of the country faced Covid-19 restrictions and with an increase in gun sales in 2021 statistics show there has also been a rise in gun violence. » Subscribe to NBC News: http://nbcnews.to/SubscribeToNBC » Watch more NBC video: http://bit.ly/MoreNBCNews NBC News Digital is a collection of innovative and powerful news brands that deliver compelling, diverse and engaging news stories. NBC News Digital features NBCNews.com, MSNBC.com, TODAY.com, Nightly News, Meet the Press, Dateline, and the existing apps and digital extensions of these respective properties. We deliver the best in breaking news, live video coverage, original journalism and segments from your favorite NBC News Shows. Connect with NBC News Online! NBC News App: https://smart.link/5d0cd9df61b80 Breaking News Alerts: https://link.nbcnews.com/join/5cj/breaking-news-signup?cid=sm_npd_nn_yt_bn-clip_190621 Visit NBCNews.Com: http://nbcnews.to/ReadNBC Find NBC News on Facebook: http://nbcnews.to/LikeNBC Follow NBC News on Twitter: http://nbcnews.to/FollowNBC #NBCNews #HallieJackson #BreakingNews