I have a "seals" memory. In the late 1960s during Vietnam, I was a team driver for Tri-State Motor Transit hauling munitions. My lead driver and I arrived at one of the west coast ports with a van load of ammo or rockets or something, and the seal was missing. You can imagine the trouble we were in!! Fortunately, the seal was located on the shipping clerk's desk. How in the world did we depart the ammo plant without a seal?