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.

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The U.S. Park Police will have its entire Washington force of several hundred on duty and along the route, on foot, horseback and motorcycles and monitoring from above by helicopter. Officers are prepared to arrest anyone who joins the march or concert without a credential and refuses to leave, said Park Police Chief Dwight E. Pettiford.

"Freedom Walk" indeed. What would Orwell say if he were alive today?