Sebastian Rotella

Marijuana has been legalized in some states, but ProPublica's Sebastian Rotella says there's still a thriving illicit market, dominated by criminals connected to China's authoritarian government.

David Coleman Headley was one of the leaders of the 2008 terrorist attack on Mumbai. A new Frontline documentary chronicles how the son of a Pakistani father and an American mother became a radicalized Islamic militant while working as an informant for the U.S. government.