Is the experience of war unique to each generation or do the risk, horror, fear, anticipation and even joy of fighting transcend time, geography and national origin? We’ll spend this hour with acclaimed journalist Sebastian Junger who spent fifteen months with a single platoon in a remote and very dangerous eastern Afghanistan valley. His book “War” (Twelve Books, 2010) is out now. The film “Restrepo” which Junger co-directed with Tim Hetherington opens in theaters this month.