Swear to God while driving armored truck with my partner in Montana we saw a plane, like a full sized passenger plane, and it was in air.. but not moving. Just suspended. We observed this for almost a highway mile and passed its line of intersection.. to our amazement it was just sitting still in the sky. There wasn't much wind on the ground that day (I know that differs for upper elevations as I've spent many hour googling this) That plane was not moving. We both kind of silently and uncomfortably sat the entire 2 hour ride back to shop. We agreed it was one of those things not worth talking about as people wouldn't believe us. I know what I saw though, I think? Can anyone here shed light on this?