Before the Arab Spring, Seif al-Islam el-Qaddafi, the second son of the Libyan dictator Col. Muammar el-Qaddafi, was establishing himself as a serious figure internationally. Then, the Arab Spring came to Libya. His father and brothers were killed and Seif himself was captured by rebels and taken to the western mountains of Libya. For years, rumors have surrounded the fate of Seif. Now he has re-emerged, touting political ambitions, but where has he been and what has he learned? Guest: Robert F. Worth, a contributor to The New York Times Magazine.