What to know as Germany investigates an explosive drone at a key cargo airportGerman authorities say a drone carrying an explosive device was discovered on the tarmac near a Ukrainian planeGerman authorities say a drone carrying an explosive device was discovered on the tarmac near a Ukrainian planeGerman authorities say a drone carrying an explosive device was discovered on the tarmac near a Ukrainian planeGerman authorities say a drone carrying an explosive device was discovered on the tarmac near a Ukrainian planeBERLIN -- For the second time in just over two years, Germany's Leipzig/Halle Airport has narrowly avoided a potential disaster, exposing the vulnerability of Europe's critical infrastructure. A drone carrying explosives was found late Tuesday at the airport and later defused. German police press on with investigationsThe drone at Leipzig airport with "an unknown explosive device" was found by an airport employee near the south runway, police said, adding it was being examined after having its detonator removed. Meanwhile, investigators started a search on Thursday surrounding the airport for debris from the object that hit a freight plane. The plane flew to another German airport, Hannover, about 200 kilometers (125 miles) to the northwest, where officials found slight damage.