Listening to the 18-minute musical monologue has been a Thanksgiving tradition among folk music fans for decades.
Journalist Sebastian Junger was supposed to be in Libya, covering the conflict there with photojournalist Tim Hetherington last month. A personal matter kept him home, and Hetherington and another photographer, Chris Hondros, were killed in a battle in Misrata.
The film focuses on a platoon of U.S. soldiers at a remote outpost in Afghanistan.
Experts share a range of perspectives on how to combat the Islamic State militant group, and the role the U.S. should play.