This will, for the Emersonknives site:
"NASA KNIFE
Disclaimer-Being a government agency, NASA cannot and will not endorse any product used by their agency in any of their operations.
Emerson Knives has been awarded a contract to produce knives for NASA and the Space Station program.
We were contacted sometime in the winter of 1999 by NASA to develop and test a knife that could be issued to the astronauts in the Space Station program. Working to a set of parameters and duties as defined by both the astronauts and engineers at NASA, several designs were considered and built. However, after a lengthy debate, a unanimous decision was reached, that the already existing design - The SPECWAR - fit all the requirements for size, weight, materials, strength, and ergonomics. The only change was to the front of the tanto style blade. The addition of a reverse hook was needed to facilitate opening food kits and other sealed items as well as any emergency situation that might require slitting open clothing or gear. The knives have been fully flight certified and tested at the White Sands, New Mexico government facility. Following are photographs of the "NASA SPECWAR."
The NASA SPECWAR knife is not currently available for civilian purchase."