For what it's worth, here are some final numbers on the fly-by that honored former President Gerald Ford at his funeral in Grand Rapids. F-15E Strike Eagles from the 4th Fighter Wing, based at Seymour Johnson AFB, North Carolina, conducted the fly-by, with tanker support from KC-135s assigned to Air Mobility Command.
Number of fighters generated (prepared/crewed) for the fly-by: 40
Number of aircraft that launched (including airborne) spares: 25
Number of F-15Es in the fly-by: 21
Number of KC-135s supporting the operation: 8
Cost to the taxpayers: Not cheap (a single KC-135 costs $11,128 an hour to operate; fighters are less expensive, but it's still pricey)
Value to the nation in honoring a fallen Commander-in-Chief: Priceless.