Rolling Thunder is an annual motorcycle rally held in Washington, D.C., that honors military veterans and raises awareness for issues affecting them. The event typically takes place over the Memorial Day weekend and attracts thousands of participants who ride through the city, culminating at the Vietnam Veterans Memorial. The rally began in 1988 and has grown significantly over the years. It serves as a tribute to those who served in the Vietnam War and aims to promote the cause of missing and imprisoned veterans. Participants often display flags and wear patches to show their support for veterans' rights and recognition.