Turkey's President Recep Tayyip Erdogan addresses a labor union meeting in Ankara, Turkey, Thursday, Dec. 3, 2015. Russia's President Vladimir Putin on Thursday hinted at more sanctions against Turkey and accused Turkey of a "treacherous war crime" in downing a Russian jet at the border with Syria. Erdogan has hotly denied that his country was involved in oil trade with the Islamic State group , and has pledged to step down if Moscow proves its accusations. (Murat Cetinmuhurdar, Presidential Press Service, Pool via AP)
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