French gendarmes walk in a filed before an official ceremony near the crash site of an Airbus A320 in Seyne-les-Alpes

French gendarmes walk in a filed before an official ceremony near the crash site of an Airbus A320 in Seyne-les-Alpes

French gendarmes walk in a filed before an official ceremony near the crash site of an Airbus A320 in Seyne-les-Alpes March 25, 2015. French investigators on Wednesday searched for the reason why a German Airbus operated by Lufthansa’s Germanwings budget airline crashed into an Alpine mountainside, killing all 150 on board including 16 teenagers returning from a school trip to Spain. REUTERS/Christophe Ena/Pool