From the relative safety of Turkey, Chechen fighters are making their way to fight in Syria; but their ultimate goal is Russia.

The Pankisi Gorge is a bucolic valley with shepherds and picturesque mountains. But in recent years, it's become better known as a jihadi recruiting ground, home to top Islamic State commanders like Omar al Shishani.

The Islamic State has proven adept at recruiting young Muslims around the world. Georgia, a small, former Soviet state whose population is just 10 percent Muslim, has been particularly hard hit.

The recruiting center for Dmytro Korchynsky’s holy war in Ukraine is located in the basement of a building in central Kiev in what used to be a billiard club. Anyone can sign up, and the location isn’t secret.

I was the first reporter allowed to visit Isa Munayev's secret base, and I would be the last to see him alive.