"The hidden front: inside the tunnels of Islamic State as the Kurdish Peshmerga advance"

"
He took us to a house which had been hit by a US B52 bomber two days earlier. Inside one of the rooms was an opening to a labyrinth of tunnels built by Isil fighters trying to hide from the coalition planes overhead. Mounds of soil had been dumped in the house next door so as not to tip-off surveillance drones...."

http://www.telegraph.co.uk/news/2016/06/04/the-hidden-front-inside-the-tunnels-of-islamic-state-as-the-kurd/

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