A handout frame grab from a video footage made available on the official website of the Russian Defence Ministry on 21 October 2015 shows an aerial view of bomb explosion after airsrike carried out by a Russian warplane against what Russian Defence Minitry says a terrorist militant group position in Aleppo province in Syria. Russia in September began a bombing campaign against militant groups in Syria to support al-Assad's government, one of Russia's closest allies in the Middle East.