Russia has mocked the U.S.-led West after the International Monetary Fund reversed a negative forecast for its economy. According to the IMF’s World Economic Outlook update, a price cap imposed by Western countries on the volume of Russian oil exports is expected to have little impact. Russian President Vladimir Putin's ally and deputy chairman of Russian Security Council lambasted Western sanctions on Russia amid its war in Ukraine. "Hostile countries are not courageous enough to recognize that their ‘infernal’ sanctions fell flat. [They] don’t work," Medvedev said. Watch this video for more details.