IRON MOUNTAIN — Seven people, four from the Iron Mountain-Kingsford area, have been arrested and charged as a result of what authorities called an operation to combat human trafficking in the region. The Dickinson County Sheriff's Department conducted the operation in Dickinson County from Oct. 8 through Oct. 12. The sheriff's department was assisted by Iron Mountain Police Department, Kingsford Public Safety, Marquette County Sheriff's Department, Chippewa County Sheriff's Department, Homeland Security Investigations, Niagara Police Department, and Menominee County Sheriff's ...