Sebastian Rotella

Thirty years after a forgotten massacre that occurred during the Guatemalan civil war, a forensic scientist and prosecutor search for Oscar, a young boy who survived the horror.

FRONTLINE investigates Pakistani-American terrorist David Coleman Headley (Dawood Sayed Gilani) who helped plan the deadly 2008 siege on Mumbai. In collaboration with ProPublica, the film — an updated and expanded version of A Perfect Terrorist — reveals how secret electronic surveillance missed catching the Mumbai plotters, and how Headley planned another Charlie Hebdo-like assault against a Danish newspaper.

FRONTLINE and ProPublica go inside Europe’s fight against terrorism — the missed warnings and the lingering vulnerabilities.

Modern history can be divided into two time frames: before 9/11 and after 9/11. This five-part docuseries is a cohesive chronicle of the September 11, 2001 attacks on the U.S., offering illuminating perspectives and personal stories of how the catastrophic events of that day changed the course of the nation.