At the beginning of "Good Kill," Maj. Thomas Egan sits at his work station, glances at his video screen, presses a few buttons - and watches bombs drop halfway around the world on people who may or may not be enemy combatants. [...] Egan, a drone pilot, leaves his trailer in the desert, hops in his car, and heads back to his cookie-cutter home near the Las Vegas Strip to be with the wife and kids.