The ExtremistThe Extremist is the fourth Leone Scamarcio thriller. On a hot summer's morning in Rome, three public placesa McDonald's, a preschool, and a cafcome under siege from a group of terrorists who appear to be Islamic extremists. When word comes through that the terrorists will only negotiate with Detective Leone Scamarcio, no one is more surprised than Scamarcio himself. The young man with frightened eyes who speaks to Scamarcio seems anything but in