For many years I carried the Air force Survival Knife attached to my backpack while hiking and camping throughout the US and Canada. It was an excellent knife, saw and hammer on many excursions.
I decided to attach it to my Action TrackChair this weekend with plastic wire ties. I may not be able to use it independently, or ever really need it anymore, but its a nice reminder of my youth. Keep in mind it's seen almost 30 years of use but still looks good.