An unprecedented undercover investigation into one of the world's most repressive regimes — Eritrea. Exclusive secret footage and testimony shed new light on shocking allegations of torture, arbitrary detention, and indefinite forced conscription.

Over most of two decades, Abu Mohammad al-Jolani's life has been a roadmap of Islamist militancy in Iraq and Syria. Designated a terrorist by the United States, the powerful Syrian militant now seeks a new relationship with the West. In his first interview with a Western journalist, the former Al Qaeda commander tells FRONTLINE correspondent Martin Smith his fight is with Syrian President Assad, not the U.S.