Claim: The Age of Lone Wolf Terrorism is becoming more common in Europe and are more frequently targeting uniformed police and military personnel.
Evidence: Age of Lone Wolf Terrorism is a 2017 book about lone wolf terrorism co-authored by Mark Hamm, a criminologist at Indiana State University and Ramon Spaaij, a sociologist at Victoria University, Australia. They also show that in recent years lone wolves have more frequently targeted uniformed police and military personnel.