snow and ice 500 Lufthansa passengers forced to sleep on aircraft overnight amid heavy snow in Munich News 500 Lufthansa passengers forced to sleep on aircraft overnight amid heavy snow in Munich Air Dolomiti February 23, 2026 Frozen runways: How extreme winter weather tested operations and resilience at European airports News Frozen runways: How extreme winter weather tested operations and resilience at European airports Airports January 16, 2026