They were epoch-altering events. This November, the American electorate will be divided along the lines of those who still have not grasped this fact and those who do.
The presidency of George W. Bush (as well as the man, himself) was forever marked and altered by those events, which were the defining moments of the GWB presidency. His response during that gut-churning time is not part of his record, but CENTRAL TO his record.
Anyone who says he should avoid mention of 9/11 in his ads, or any other time during his campaign, is actually trying to prevent GWB from running on his record. Near as I can remember, this is the first time a president's political opponents want to avoid a discussion of his bona fide record. Gee, I wonder why...