BALTIMORE (AP) — Hundreds of motorcyclists are riding across parts of Pennsylvania, western Maryland and northern Virginia as part of a Sept. 11 anniversary event.

They were scheduled to leave Shanksville, Pa., Friday morning. Their route includes parts of interstates 68, 70 and 66.

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This is the 11th annual ride organized by America’s 911 Foundation to support emergency responders and honor the victims of the Sept. 11, 2001, terrorist attacks.

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On Thursday, they visited the Flight 93 crash site memorial near Shanksville. They’re spending Friday night near the Pentagon, where another jetliner controlled by terrorists crashed.

The ride continues Saturday up Interstate 95 to New York City and the World Trade Center. A ceremony is planned Sunday at the memorial to victims of the two jetliners that crashed there.

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