Watch: Biden warns Putin of personal sanctions if Russia invades Ukraine

U.S president Joe Biden warned Moscow of damaging sanctions, including measures personally targeting Vladimir Putin, if it moves ahead with an invasion of Ukraine, as Russian combat troops massing around the pro-Western country launched new exercises. A senior US official laid out economic sanctions "with massive consequences" that go far beyond previous measures implemented in 2014 after Russia invaded Ukraine's Crimea region. Watch this video for more details.