Here are photos highlighting the 30th anniversary of the Rolling Thunder "Ride for Freedom" demonstration, where motorcyclists from all over the country come to D.C. to call on the government to bring those missing in action or held as prisoners of war back home.
A military helicopter flies over a police escort on the Memorial Bridge, for motorcyclists riding in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists participate in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Three men watching motorcyclists, use cardboard boxes as umbrellas while it rains on the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists participate in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
A motorcyclist in front of the Lincoln Memorial, waves to riders as they participate in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Supporters line the street as motorcyclists participate in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists pass Marine Staff Sgt. Tim Chambers, Ret., and Christian Jacobs, 6, of Hertford, N.C., as they salute during the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Jacobs father, Marine Sgt. Christopher Jacobs, was killed while serving in 2011. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists pass the Lincoln Memorial during the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists participate in the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
Motorcyclists cross the Memorial Bridge during the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
A pair of military boots are left at the Vietnam Veterans Memorial during the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
A motorcyclists transfer a name of a deceased soldier at the Vietnam Veterans Memorial during the 30th anniversary of the Rolling Thunder ‘Ride for Freedom’ demonstration in Washington, Sunday, May 28, 2017. Rolling Thunder seeks to bring full accountability for all U.S. prisoners of war and missing in action (POW/MIA) soldiers.
(AP Photo/Cliff Owen)
AP Photo/Cliff Owen
For participants, Rolling Thunder is a symbol of unity.
(WTOP/Dennis Foley)
WTOP/Dennis Foley
Rolling Thunder began as a demonstration calling on the government to bring those missing in action or held as prisoners of war back home.
(WTOP/Dennis Foley)
WTOP/Dennis Foley
Thousands mounted their motorcycles this weekend for the annueal Rolling Thunder event.
(WTOP/Dennis Foley)
WTOP/Dennis Foley
Riders came from all across the country to participate in Rolling Thunder.
(WTOP/Dennis Foley)
WTOP/Dennis Foley
“Each year, when I am in the parade, it’s finally our parade home,” said Al Beck, a Rolling Thunder rider.
(WTOP/Dennis Foley)