ANTALYA, TURKEY - NOVEMBER 16: Russian President Vladimir Putin (L) and Russian Foreign Minister Sergei Lavrov (R) await a meeting with British Prime Minister David Cameron during the G20 Antalya Summit on November 16, 2015 in Antalya, Turkey. World leaders are attending the two-day G20 summit in Turkey in the wake of the Paris terror attacks. The Syrian conflict, the migration crisis and the threat of Islamic State are expected to top the agenda. (Photo by Sasha Mordovets/Getty Images)
