2015 Event Clues in the crash of a Germanwings flight during clear weather Tuesday suggest that the co-pilot locked the pilot out of the cabin before deliberately downing the jet in the French Alps; investigations of the co-pilot, Andreas Lubitz, are ongoing 2012 Event Following an avalanche that swept away nine climbers, Italian and French rescue crews recover the bodies of two climbers on Mont Blanc in the Alps 2010 Event In the Swiss Alps, final breakthrough occurs on the east bore of the Gotthard Base Tunnel, now the world's longest railway tunnel 1980 Event World's longest auto tunnel, St. Gotthard in Swiss Alps, opens 1972 Event 1st hot air balloon flight over Alps 1940 Event Adolf Hitler and Benito Mussolini confer at Brenner Pass in Alps 1917 Event French troop train derails in French Alps killing 543 1509 Event French army under Louis XII enters Alps