epa04678020 Students stand in front of candles placed on the steps of the Joseph Koenig High School before class started, in Haltern am See, Germany, 25 March 2015. Among those on the plane were 16 students and two teachers from the Joseph Koenig High School in the western German city of Haltern. The students, ages 15 and 16, had been on a one-week exchange programme to Barcelona. Search crews planned to resume helicopter flights around dawn on 25 March 2015 to the remote mountainside in southern France where Germanwings Flight 4U 9525 from Barcelona to Duesseldorf crashed after a rapid descent, likely killing all 150 people aboard on 24 March. EPA/MAJA HITIJ