Motorcyclists drive through Northern Virginia on their way from Shanksville, Pa. to Ground Zero.
A memorial motorcycle ride in remembrance of 9/11 victims is rolling through the D.C. area, causing traffic delays.
Almost 2,000 motorcycles are participating. The ride began this morning in Somerset, Pa., near the site where one plane crashed into a field on Sept. 11, 2001.
The convoy traveled through western Maryland, reaching Virginia at about 2:40 p.m. By 4 p.m., it had left Fairfax County on eastbound Interstate 66 en route to Arlington.
Police said the convoy could stretch for as long as 15 miles. They warned commuters and those traveling to and from Dulles airport this afternoon to leave with plenty of time to spare.
The riders reached the Pentagon at 4:19 p.m., where they' planned to honor 9/11 victims, before proceeding to the site of the World Trade Center in New York City on Saturday.
The Maryland State Highway Administration is tracking the convoy and posting updates on its Twitter feed.
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