Go here and read about the Flight 93 Memorial Project. The winning design chosen to memorialize the heroes and victims of 9/11's Flight 93 is in the shape of a red crescent that looks like the Islamic symbol.
The ACLU has brought suit to have a tiny cross removed from Los Angeles County seal. Where are they on this?
If you do nothing else today, write to the National Park Service to protest. It's the least you can do in memory of those who died so bravely. If you have a blog, get the word out. Do not allow this to stand.