Trail of death and destruction left behind by the ISIS-Khorasan terror outfit in Kabul on August 26. The dreaded terror group takes the lives of 13 US soldiers and more than 170 Afghans. The ISIS Khorasan outfit is a regional branch of ISIS and is active in Afghanistan and Pakistan. But who exactly is the ISIS-K? Why is the world worried about this dreaded terror outfit? Watch the video to know more.