On 11 September 1951, Captain Edward J. Ruppelt took over the reins of Project Grudge; and one month later, a revamped version was established – Grudge II.
The Battelle Memorial Institute, a "think-tank" consulting firm, was asked to prepare a statistical study of UFO reports obtained up until that time period. Several months later, in March 1952, Grudge II was officially designated as Project Blue Book – a project that would remain in existence until 1969.
Although it was determined that there was a distinct lack of evidence to support the notions that UFOs were extra-terrestrial in origin, the Robertson Panel nevertheless felt that UFO sightings represented a potential danger to national security that could be exploited for propaganda and psychological means by the Soviets. It was this concern that prompted the Robertson Panel to conclude that UFO mystery should be demystified. This was to be the role assigned to Blue Book.
Moreover, despite all the hype that continues to surround Blue Book, it was never anything more than an exercise in public relations and received minimal staffing from one officer, two clerks and a number of typists. Until it was officially terminated in 1969, Blue Book continued to present seemingly adequate explanations to the UFO mystery whilst the real work went on behind the scenes.
As evidence of this, consider the following extracted from a 1969 USAF memorandum prepared by Brigadier General C.H. Bolender, the Air Force’s Deputy Director of Development.