>>73299It used to be issued to pilots in the USAF, but that specific design stopped being issued around the turn of the century. This is the modern design.
>>73305They're fairly common carry for hikers/hunters and so forth. It's a popular design and sold in large numbers to civilians. The original design was by Camillus and issued in large numbers until the early 2000's.
Chances are, somebody just dropped their knife.