The boomerang is already in flight in the U.S., a sociologist says. If the hyper-militarization of Immigration and Customs Enforcement in places like Minneapolis looks like something out of a war zone — Iraq in the early 2000s, for example — you may not be far off: The “imperial boomerang” — a theory increasingly discussed online — describes how superpowers develop violent systems of control and surveillance in colonial territories, only to later turn those same tactics inward and use them