Residents and a Free Syrian Army fighter walk along a street lined with damaged buildings in Deir al-Zor, Syria on April 7, 2013. (Photo: REUTERS/ Khalil Ashawi)
Olly Lambert of our partner program Frontline decided to spend an extended period reporting from both sides of Syria's war.
For five weeks last fall, Lambert criss-crossed the Orontes river which has now become a dividing line in the civil war.
He talks with anchor Marco Werman about how the once-friendly neighbors have turned into bitter enemies.
Lambert's film for Frontline, "Syria Behind the Lines," airs Tuesday, April 9, at 10 pm on PBS.