Patriotic theme this week.....Cool!
I didn't think I had anything til I looked up on the shelf in the computer room.
I did these a couple of years ago.
First one was an inspiration from OCC's "POW/MIA" bike.
Second I did in 2003. Even a railroad can show its support.
Good question. When I was shooting them, thought of sand. Looks like heavy duty lines going to them. CNG or compressed air???? Photos are stored in aux. harddrive. Will "hook up" and enlarge. Also will ask around.