The region where amateur Islamic extremists are turned into killers: DAVID PATRIKARAKOS reveals terrifying new tactics IS is using to infiltrate West, group's chilling vision for the future... and why we're completely unprepared

They say the jungle on the island of Mindanao has its own acoustics. Gunfire doesn't crack so much as roll: a ripple that shudders through trees and comes back at you from a dozen angles.

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