Russian President Vladimir Putin (R) with Defence Minister Sergei Shoigu attend a meeting on Russian air force's activity in Syria at the national defence control centre in Moscow, Russia, November 17, 2015. Russia said on Tuesday it had stepped up air strikes against Islamist militants in Syria with long-range bombers and cruise missiles after the Kremlin said it wanted retribution for those responsible for blowing up a Russian airliner over Egypt.(Photo/Agencies)
