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CBC in Syria: Aftermath of alleged gas attacks in Douma

With rare access, CBC is in Syria to get an up-close look at the aftermath of an alleged gas attack in Douma. There, CBC News reporter Margaret Evans found a sophisticated set of tunnels that present a clearer picture of how rebels persisted for so long.
With rare access, CBC is in Syria to get an up-close look at the aftermath of an alleged gas attack in Douma. There, CBC News reporter Margaret Evans found a sophisticated set of tunnels that present a clearer picture of how rebels persisted for so long. 6:20