In October 1973, an unhappy Leonard Cohen was listening to the radio on his Greek island home when he heard that Israel was at war. He headed to Tel Aviv, exchanging a personal and creative crisis for a national one. Absent a plan and even a guitar, Cohen wound up serenading Israeli soldiers at the front. Journalist Matti Friedman talks about his book Who by Fire with EconTalk host Russ Roberts and explains how a songwriter and a nation were transformed in the crucible of war.