Project Pounce
Project Pounce is another UFO related project.
Some sources considered Project Pounce to be an earlier version of Project Blue Book, though most researchers believe that Blue Book was only preceded by Sign and Grudge. They are supported in this by the official documentation that is currently available (through FOIA etc.).
MW Cooper claimed that Project Pounce was more than that. He said it also is the project formed to recover all downed or crashed craft and aliens. (Other sources describe a similar project, yet, call it project Bluefly.)
UPDATE: Declassified CIA documents reveal that in January 1953 a panel of scientists had looked into the matter of "Unidentified Flying Objects" on behalf of the Intelligence Advisory Committee. This investigation - referred to as Pounce - ran independently from Blue Book. (Blue Book was a Pentagon investigation). This was meant as a threat assessment, and it came to the conclusion that UFOs did not pose a threat.