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

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.

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 American-born terrorist David Coleman Headley, 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.

Three months after President Donald Trump returned to office in 2025 and began his major immigration crackdown, he held a White House sit-down with a popular Latin American leader who had once called himself the world's coolest dictator. As the documentary explores, Bukele opened the doors of the notorious Salvadoran prison known as CECOT to planeloads of mostly Venezuelan U.S. deportees that the Trump administration had swept up and accused of being gang members. Later reporting would reveal that most of the men had no criminal convictions in the U.S. or proven gang affiliations.