It might also be a good idea to double check with external individuals and organizations to verify their actions / representation / presence.
If the playing of taps, and/or the four fives is to done with downloaded files, this might also be a good time to verify that everything works properly.
Based on the nature of our business, it might also be a good time to make sure that each assignment has an assigned backup (where possible).
September 10th - One Day Before September 11th.
September 11th - the day of the Ceremony.
September ?? - the follow-up meeting.