FRONTLINE: A Perfect Terrorist

FRONTLINE and ProPublica investigate the mysterious circumstances behind American David Coleman Headley's rise from heroin dealer and government informant to plotting the 2008 terrorist attacks on Mumbai. Despite repeated warnings, how did Headley slip into India to scout targets? And how much did U.S. officials know about his relationship with terrorist group Lashkar-i-Taiba?

PBS | November 22, 2011