September 11, 2001 terrorist attacks on New York and Washington, DC.
It serves as a memorial to those who lost their lives in the attacks and also to the public servants who lost their lives trying to save victims.
Much like Pearl Harbor or the JFK murder every American remembers where they were when they first heard the news about September 11th .
The flag in this photo reminds me of the months following 9/11 when everywhere you went there were flags flying from homes, flag stickers on cars and a genuine attitude of patriotism.
That spirit of American oneness is not the same spirit that drives the ideas of burning Korans or other acts of stupidity which do nothing but stoke the flames of hatred.
Instead of protesting 9/11 should be a day to celebrate the American spirit of resilance against attack and remember those who have died in the cause of freedom.