Munich airport said on Saturday it was gradually resuming flights from 7am (0500 GMT), with delays expected through the day, hours after both runways were closed for the second time in less than 24 hours due to a drone sighting. The airport advised travellers to check with their airlines as it prepared for the restart, two hours later than originally scheduled, after the Friday evening closure. Dozens of flights had been diverted or cancelled, stranding some 6,500 passengers, authorities said. European aviation has repeatedly been thrown into chaos in recent weeks by drone sightings that some authorities have blamed on Russia. The Kremlin has denied any involvement. Authorities have yet to attribute Thursday's or Friday's drone sightings to a specific...