QUSAIR, Syria — Sitting on a tennis court at a summer villa in the Syrian countryside, 22 would-be rebel fighters watched as a young man took apart and reassembled a machine gun he had picked from a small spread of arms on a plastic lawn table.
"OK, Saeed," said the instructor, 1st Lt. Nazir Jabir, 25, calling on a student in the back row. "What's the name of this machine gun? Stand up."
Saeed stood up, hands clasped behind his back as if in a proper classroom. "PKC," he said, and then a little louder, "PKC."
