Emergency responders arrive at Sennaya Square in St Petersburg following an explosion on the metro.
원문출처 : http://www.cnn.com/videos/world/2017/04/03/helicopter-sennaya-square-st-petersburg-metro-explosion-sje-mobile-orig.cnn
원문출처 : http://www.cnn.com/videos/world/2017/04/03/helicopter-sennaya-square-st-petersburg-metro-explosion-sje-mobile-orig.cnn