Tire fire & burned trailer

Here’s a few photos of a burned trailer Jack took some years ago.  He came across it north of Coldfoot.  He’s not sure how the tires caught fire, but somehow they did.  It could’ve been that the driver got a couple of flat tires and kept driving, or that the brakes locked up.  He suspects the brakes did not release for some reason.  There’s more explanation on the captions, click on the first one and scroll to the right to see them all.