Battle Zones: Ukraine and Syria

In a FRONTLINE interview, a Syrian rebel fighter describes how he learned where he and his fellow fighters would be trained, and what happened once they reached the designated base in Qatar.

In a FRONTLINE interview, a young Syrian rebel fighter talks about the tactical training he received from Americans, along with a new uniform and rugged boots.

FRONTLINE reveals firsthand the deep-seeded hatreds between right-wing Ukrainian nationalists with historic ties to the Nazis, and violent pro-Russian separatists vying for control of the country.

FRONTLINE Reporter Muhammad Ali crosses into the war zone, and finds Syrian rebel fighters who say they're being secretly armed and trained by the United States, out of a previously unreported location.

"Battle Zones: Ukraine & Syria" premieres May 27. In Ukraine, with personal and dramatic footage, FRONTLINE reveals the deep-seeded hatreds between right-wing Ukrainian nationalists with historic ties to the Nazis, and violent pro-Russian separatists vying for control of the country. And in Syria, FRONTLINE finds rebel fighters who say they’re being secretly armed and trained by the United States.

Obama said he wants to step up training for rebel groups in Syria. But there's already a covert rebel training program in effect. FRONTLINE's Muhammad Ali explains how it works.