I don't think September 11 should be mentioned in the same paragraph as the achievement of Apollo- I ask only that you remove that comparison- because Apollo represents all that is great about America. 
The men that perpetrated September 11 could only destroy and murder the innocent people and their families in their thousands because it  was made easy for them to do so. Their first action was to slit the throat of an innocent defenceless stewardess.
 
Please don't link the two even in the "where were you" context- it gives a bad taste!!