Here's the webpage to register for the Freedom Walk.
"The America Supports You Freedom Walk is an event on September 11 [2005] that allows citizens the opportunity to remember the victims of September 11, honor our veterans past and present, and celebrate our freedom." It "begins near the Pentagon crash site, crossing Arlington National Cemetery, passing several National memorials, and concluding adjacent to the National Mall and Reflecting Pool with an America Supports You concert by country superstar singer and songwriter Clint Black."

Members of the public who wish to walk through those public places past public monuments at that time must register. People who fail to register will apparently not be free to participate in the Freedom Walk. Bringing you new ways in which "freedom isn't free"???