NORTH CHICAGO, Ill. (CBS) — In a Memorial Day tradition in several states including Illinois, members of the advocacy group Rolling Thunder held a parade across the northern suburbs.

They gathered in North Chicago and set off on a 55-mile motorcycle ride through 15 suburban towns – including Lake Bluff, Lake Forest, Glenview, and Niles.

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Some displayed flags to honor prisoners of war, as well as servicemembers who remain missing in action.

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There was an even larger procession in Washington, D.C. More than 50,000 motorcyclists filled the streets there as they drove around the National Mall and the Lincoln Memorial.

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The event honors fallen or missing servicemen and women and aims to draw attention to veterans’ issues.

CBS 2 Chicago Staff