How have the events of 9/11 and its aftermath shaped what it means to be an american?

Prior to 9/11, we thought that we are invincible as a nation and nothing in their right minds would dare to defy us. But then 9/11 came and then we realized we are us vulnerable as the other nations. After 9/11, America stood up as a nation once more believing that we can make it great again and make it strong again this time not through military might not through economy but through the solidarity of its people. Before 9/11 we are already a great nation. After 9/11, we become a legend not because we are still America minus two great buildings but because we came out unfazed despite the many lossess we have had in that one fateful day. 9/11 did not show the weakness among us, it showed our strength. Our unity amidst chaos.