FILE - In a Sept. 2, 2019, file photo, pedestrians walk the Mackinac Bridge on during the 62nd annual Labor Day Bridge Walk in Mackinaw City, Mich. A bomb scare closed the bridge connecting Michigan's two peninsulas for about three hours on Sunday afternoon, July 18, 2021, authorities said. The Mackinac Bridge Authority said nothing was after an extensive search. (AP Photo/John L. Russell, File)
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