Problem:

The Year is1966. Within Strategic Air Command (SAC), eight B-52 bombers and aircrews were placed on an increased state of readiness (On Alert) at many bases so
that they could be airborne quickly after a Launch Order was received. (Thankfully all of the 1,000s of "Launch Orders" throughout the dozens of SAC bases during the many years of operation turned out to be for practice) 

Sam recognized one really big Problem.! After completion of a typical "Launch Order", with eight B-52s having raced to the runway, it would take an average of 2 hours to get all the aircraft parked back in their original alert positions.

During this time there was no official Checklist or Flight Manual procedure to shut down some of the (unneeded) engines during the long wait on the taxiway.

Thus the eight B-52s sat with all 8 engines idling for this long period of time. With an obvious horrendous waste of fuel and unneeded wear on the engines.

B-52 pilot Sam Dehne single-handedly took it upon himself to re-write the appropriate section of the Flight Manuals and go through the lengthy and
sometimes difficult administrative actions required to change the Manual with Official numbered steps that would Allow/Order crews to shut down 4 of the
B-52's 8 huge engines during the long wait on the taxiways.

Thanks to Dehne’s tenacious conversations and correspondences with the Strategic Air Command bureaucracies.. that were not initially receptive of his
suggestions.. in 1967 the B-52 Checklist was changed to adopt Dehne’s cost-saving Directive.

For B-52 Pilots it became in essence mandatory to shut down 4 engines according to the B-52 Checklist, which stipulated:

Alert procedure:
1. After clearing of runway during practice alert, the outboard engines will be shut down during re-parking to the Alert position.
1a. This action will be taken unless other circumstances preclude such action.

This Checklist procedure that Dehne had established gradually morphed into crews on all types of military aircraft.. and even
in civilian aviation industry.. routinely shutting down outboard engines during tax-back from regular missions and flights.

Because of Dehne’s patriotic and diligent actions the Air Force and the Nation have save untold $$billions of dollars.
(Undoubtedly some pilots might be heard muttering, "I could have thought of that.", but only Dehne had the gumption and patience
to take the necessary action to make the procedure an Official part of Crews' Taxi-Back procedure.)

There were hundreds of B-52s on Alert, with an average of a practice Alert every month at each of myriad Air Force bases.. with those B-52s
going through these Military Procedures for over a decade.. vis a vis cost of fuel, wear and tear, and even eventual inculcation of the Procedure
into many other areas of aviation, etc, etc.
To declare that the SAVINGS to have been at least $2 Billion dollars is well within the realm of probability.

For his efforts Dehne, under the auspices of "Air Force Big-R Cost Reduction Program", received a Certificate of Appreciation and check for $500.