KEY POINTS
The U.S. Treasury Department has made clear that Cuba is not allowed to take delivery of Russian crude.
The warning comes at a time when two tankers carrying Russian oil and gas are thought to be on their way to Havana.
The fuel-starved Caribbean island is facing its biggest test since the collapse of the Soviet Union under a U.S. oil blockade.
Oh, good, we haven’t had a ship-based Cuban crisis in a while. Surely the diplomacy will be well navigated.
Maybe we’ll get another gulf oil spill while we’re at it.