Commemorating WMDs
Fintan emailed me a nice parallel concerning the display of the Enola Gay in a US national museum. Apparently this airplane has no distinguishing features aside from the fact that it conveyed the first atomic bomb that killed hundreds of thousands of civilians.
Anyway, his point is that for USians to understand how this strikes many people, imagine if sometime around 2050 Al Qaida was to pay for a monument to be erected in Saudia Arabia to commemorate the airplanes that struck the World Trade Center and the Pentagon on September 11th, 2001.