A man walks by flowers and candles mourning victims of the crashed plane of Germanwings at the Tegel airport in Berlin, Germany, on March 25, 2015. An Airbus A320 of the German low-cost airline Germanwings with 150 people on board crashed on Tuesday in southern France, French authorities confirmed. Photo: Xinhua

A man lights up candles to mourn victims of the crashed plane of Germanwings at the Tegel airport in Berlin, Germany, on March 25, 2015. An Airbus A320 of the German low-cost airline Germanwings with 150 people on board crashed on Tuesday in southern France, French authorities confirmed. Photo: Xinhua

Messages to mourn victims of the crashed plane of Germanwings are seen at the Tegel airport in Berlin, Germany, on March 25, 2015. An Airbus A320 of the German low-cost airline Germanwings with 150 people on board crashed on Tuesday in southern France, French authorities confirmed. Photo: Xinhua