Biden and Putin exchange warnings over Ukraine

U.S. President Joe Biden and Russian President Vladimir Putin exchanged warnings in a 50-minute call over Ukraine but conveyed some optimism that diplomatic talks in January could ease spiraling tensions. #News #Reuters #Ukraine #JoeBiden #VladimirPutin #US #Russia Subscribe: http://smarturl.it/reuterssubscribe Reuters brings you the latest business, finance and breaking news video from around the globe. Our reputation for accuracy and impartiality is unparalleled. Get the latest news on: http://reuters.com/ Follow Reuters on Facebook:   / reuters   Follow Reuters on Twitter:   / reuters   Follow Reuters on Instagram: https://www.instagram.com/reuters/?hl=en