Belgium

Under the ISIS model in Syria, "It's become a sort of family jihad," says a French journalist. "Couples go together, sharing a common project. And the role women play is as strong as that of men."

The attacks in Brussels were followed by appeals for national unity. But Belgium is a country long driven by sectarian divide, and nationalist politicians say the attacks support their cause.

Belgian playwright Ismael Saidi is taking his anti-radicalization message to schools in heavily Muslim neighborhoods. He finds extremism still has appeal, even after last week's terrorist attacks.

The ISIS cell behind this week's attacks in Brussels may have aspired to build a radiological bomb, officials with knowledge of the investigation say.

Terrorist attacks in Brussels killed at least 31 and wounded at least 270 on Tuesday. As the city mourns, police continue to search for a suspected accomplice.

"We have a problem," says Belgian Muslim playwright Ismaël Saïdi. His solution: writing and producing a comedy play about three men who go to fight a holy war. It's become an unlikely hit in Brussels.