The US carried out a drone strike against a vehicle threatening the Kabul airport that had been linked to the regional Islamic State chapter, an American military official said on Sunday. br br “US military forces conducted a self-defence unmanned over-the-horizon airstrike today on a vehicle in Kabul, eliminating an imminent ISIS-K threat” to Hamid Karzai International airport, said Bill Urban, a spokesman for the US Central Command. br br “Significant secondary explosions from the vehicle indicated the presence of a substantial amount of explosive material,” he said.