Yesterday afternoon, a fire destroyed three buildings at the Flight 93 National Memorial near Shanksville, PA. The buildings were part of a headquarters complex about two miles from the actual crash site, and included storage space for 9/11-related memorabilia and artifacts. No one has been reported as injured. The memorial itself and a visitors center, currently under construction, were not affected. The cause of the fire is not yet known.
Read more at CBS Pittsburgh, CNN, AOL and Reuters.
UPDATE: From the Associated Press, a flag that had flown over the Capitol building was lost in the fire.