> abu bakri knows what he is doing. he is one of those very, very cool-headed, experienced commanders, and he is very methodical in the way he fights his battles. >> (translated): this is a bomb to destroy a tank. it's hollow on this side and blows out here. we plant it in the roads because we don't have the bombs to match what they have. we make them by hand. like these, small or large, according to the target-- anti-tank, anti-personnel or against buildings. make the bombs. >> narrator: abu bakri and his men advanced into no man's land. they wanted to establish the location of the syrian army's most forward position. >> narrator: some of the fighters believed they should go no further. but abu bakri sensed the tide was turning, that the government was pulling back. (explosion) >> narrator: the rebels moved forward. >> narrator: they'd fought in this district before, and knew a route that passed through abandoned houses. the families who'd lived here had fled in a hurry, abandoning their possessions. >> narrator: abu b