The pensive but eager teenager peered out the tiny airplane window, watching everything he ever knew vanish beneath the clouds. For the first five minutes, Bilal Hassane Souley’s upbringing — all 18 years of it — flashed before his eyes as he flew out of Diori Hamani International Airport of Niamey, Niger.Later, he recalled this moment the most agonizing 300 seconds of his life. But as Hassane Souley peered down at the fading city he would forever call home, he knew boarding a flight halfway aro