How Sanctions Affect North Korean Behavior

The U.S. and South Korea are considering further punitive action against North Korea after the country's first successful missile launch from a submarine. But new research suggests that existing sanctions haven't really done anything to slow North Korea's pursuit of nuclear weapons.

Here & Now's Jeremy Hobson speaks with security analyst Jim Walsh about the study.

Jim Walsh, Here & Now security analyst, research associate at the Massachusetts Institute of Technology's Security Studies Program. He tweets @DrJimWalshMIT.