A few years ago, Oscar®-nominated filmmaker Sebastian Junger (“Restrepo”) planned a walk from Washington, D.C. to New York City along Amtrak railroad lines with his close friend, acclaimed war reporter Tim Hetherington. After Hetherington was killed covering the Libyan civil war in 2011, Junger decided to take the same trip, joined instead by a Spanish photographer who was at Hetherington’s side when he died and two combat vets they’d known in Afghanistan.