Organizers of the Pentagon's 9/11 memorial Freedom Walk on Sunday are taking extraordinary measures to control participation in the march and concert, with the route fenced off and lined with police and the event closed to anyone who does not register online by 4:30 p.m. today.
The march, sponsored by the Department of Defense, will wend its way from the Pentagon to the Mall along a route that has not been specified but will be lined with four-foot-high snow fencing to keep it closed and "sterile," said Allison Barber, deputy assistant secretary of defense.
What's unusual for an event on the Mall is the combination of fences, required preregistration and the threat of arrest.
One restricted group will be the media, whose members will not be allowed to walk along the march route. Reporters and cameras are restricted to three enclosed areas along the route but are not permitted to walk alongside participants walking from the Pentagon, across the Memorial Bridge to the Mall.