Ukrainian Prime Minister Arseniy Yatsenyuk (R) gastures as he walks with US Vice President Joe Biden to deliver a statement on the results of talks in Kiev on December 7, 2015. US Vice President Joe Biden, on a three-day working visit to Ukraine, said the world's focus on Syria did not overshadow Western demands for Russia to adhere to a shaky Ukrainian peace agreement and to hand back Crimea to Kiev. / AFP / POOL / SERGEI SUPINSKY