I was empty around washington d.c a few years ago, and was dispatched to pick up a 2 million dollar deep sea diving suit. One of a kind, that they use to go down after disabled submarines. It hung in it's own custom harness, on wheels. A real challenge to get it into the trailer and secure it. Nothing else was permitted to be in the trailer, except my tie down and decking gear that i carried. A staight run to the navy base in pensacola, after pickup. It paid $3500, and we were down there the next morning. They showed us around the facility, where they had tanks that could duplicate the undersea pressure to any depth. I couldn't believe how a submarine hull could be squashed like nothing by that pressure!