SEYNE-LES-ALPES, France (AP) — The ravine echoes with helicopter rotors, the scrape of metal on stone, the rumble of sliding scree as the remnants of Germanwings Flight 9525 dislodge from the mountainside. The somber mission to recover the remains of 150 people killed when their plane slammed full speed into the Col de Mariaud is not a quiet one, and evidence can be gathered only when the mountains cooperate. From 8:30 a.m.