WALL-E, the 2008 animated film about a robot cleaning up a post-apocalyptic Earth plays in the dark. The plane is quiet; the hum of the engine muffles the sounds of sleeping passengers all around me. I can’t sleep. This morning I got to the airport twelve hours early for a flight from Santiago, Chile to Miami, USA. The taxi driver took my last peso so my time in the airport was spent lying on the concrete floor and carefully rationing my trail mix before the flight. Now, finally in the air, I expect to feel relief…