Secretary of state warns U.N. of Russia's preparation to invade Ukraine
Secretary of State Antony Blinken told the United Nations that Russia is ready for a "massive military assault" on Ukraine. Plus, top White House advisers meet with Senate Democrats on Capitol Hill. CBS News intelligence and national security reporter Olivia Gazis and CBS News congressional correspondent Nikole Killion join "Red & Blue" anchor Scott MacFarlane with the latest.