After 10 months of intense combat, the war in Ukraine heads into a cold and dark New Year. For Ukraine and its president, Volodymyr Zelenskyy, it is a fight for survival; for Russia and its president, Vladimir Putin, it's a military debacle. CBS News national security correspondent David Martin talks with military scholar Fred Kagan about the prospects of Russia breaking the Ukrainians' will to fight as Putin attacks their cities and energy grid. #ukraine #zelenskyy #putin "CBS Sunday Morning" features stories on the arts, music, nature, entertainment, sports, history, science and Americana, and highlights unique human accomplishments and achievements. Check local listings for CBS Sunday Morning broadcast times. Subscribe to the "CBS Sunday Morning" YouTube channel: http://bit.ly/20gXwJT Get more of "CBS Sunday Morning": http://cbsn.ws/1PlMmAz Follow "CBS Sunday Morning" on Instagram: http://bit.ly/23XunIh Like "CBS Sunday Morning" on Facebook: https://bit.ly/3sRgLPG Follow "CBS Sunday Morning" on Twitter: http://bit.ly/1RquoQb Subscribe to our newsletter: http://cbsn.ws/1RqHw7T Download the CBS News app: http://cbsn.ws/1Xb1WC8 Try Paramount+ free: https://bit.ly/2OiW1kZ For video licensing inquiries, contact: [email protected]