US President Joe Biden provides an update on Russia and Ukraine during remarks in the East Room of the White House in Washington, US, February 22, 2022. REUTERS/Kevin Lamarque US President Joe Biden announced on Tuesday new sanctions in retaliation for Russia recognizing two breakaway regions of Ukraine and sending troops there, adding to Western efforts to stop what they fear is the beginning of a full-scale invasion. The measures target Russian banks and sovereign debt, among other steps. One of the worst security crises in Europe in decades is unfolding as Russian President Vladimir Putin authorized sending what he...