French military personel make their way up the mountain as part of operations as they advance to the crash site of an Airbus A320, near Seyne-les-Alpes

French military personel make their way up the mountain as part of operations as they advance to the crash site of an Airbus A320, near Seyne-les-Alpes

French military personel make their way up the mountain as part of operations as they advance to the crash site of an Airbus A320, near Seyne-les-Alpes, March 25, 2015. French investigators will sift through wreckage on Wednesday for clues into why a German Airbus operated by Lufthansa’s Germanwings budget airline crashed into an Alpine mountainside, killing all 150 people on board including 16 schoolchildren returning from an exchange trip to Spain. REUTERS/Jean-Paul Pelissier