Tuscola County prosecutors filed terrorism-related charges Saturday against three men who they say bought dozens of cell phones Friday in Caro in a globally coordinated plot involving the Mackinac Bridge. They charged brothers Adham Abdelhamid Othman, 21, and Louai Abdelhamied Othman, 23, along with their cousin, Maruan Awad Muhareb, 18, with identical counts of collecting material to support terrorist acts and surveillance of a vulnerable target with intent to committ terrorism.