This is a little more subtle politically until you read that the one-foot lead cubes contain nuclear waste.
This was a public art proposal that had no chance of getting funded. It it got past the political issues, it would have been to fragile for public art. Maybe in steal.
Note: I’m not sure of the date on this piece. I remember doing this piece in my studio in Minneapolis, which would make it in 1981 or 1982.