A jailhouse interview with a German man who joined the Islamic State reveals the
workings of a unit whose lieutenants are empowered to plan attacks around the world.

He (Harry Sarfo ) barely had time to settle in before members of the Islamic State’s secret service, wearing masks over their faces, came to inform him and his German friend that they no longer wanted Europeans to come to Syria. Where they were really needed was back home, to help carry out the group’s plan of waging terrorism across the globe.

“He was speaking openly about the situation, saying that they have loads of people living in European countries and waiting for commands to attack the European people,” Mr. Sarfo recounted on Monday, in an interview with The New York Times conducted in English inside the maximum-security prison near Bremen. “And that was before the Brussels attacks, before the Paris attacks.”

The masked man explained that, although the group was well set up in some European countries, it needed more attackers in Germany and Britain, in particular. “They said, ‘Would you mind to go back to Germany, because that’s what we need at the moment,’” Mr. Sarfo recalled. “And they always said they wanted to have something that is occurring in the same time: They want to have loads of attacks at the same time in England and Germany and France.”
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“For America and Canada, it’s much easier for them to get them over the social network, because they say the Americans are dumb — they have open gun policies,” he said. “They say we can radicalize them easily, and if they have no prior record, they can buy guns, so we don’t need to have no contact man who has to provide guns for them.”