Libyan capital Tripoli rocked by intense fighting

Rival militias in the Libyan capital of Tripoli have clashed this week, damaging parts of the city during intense fighting. The violence follows the assassination of an influential militia commander who was allied with both of Libya's rival governments. Host Marco Werman speaks with Tarek Megerisi, a senior fellow at the European Council on Foreign Relations, about the causes behind Libya's instability, years after the overthrow of former dictator Muammar Gaddafi in 2011.