Several of the atrocities happening in the Ukraine war are being linked to a mercenary organization called the Wagner Group. The Kremlin-linked mercenaries have operated in countries in the Middle East and in Africa as well, and are often trailed by allegations of human rights abuses.Sean McFate, former mercenary and now senior fellow at the Atlantic Council think tank, explains how this group operates, why mercenaries might become more common in the future and how Wagner members he speaks to feel about what they’re doing.