The question was what country contacts the Caspian Sea and the Persian Gulf.
I had the right answer and the navy guy should have known it but he said Iraq. It was Iran.
I thought it was a fairly difficult question tho I did get it.
At first I thought maybe “Russia” then thought “Iran” but I wasn’t sure.
On today’s answer I was basically certain because I remembered the story of the milk maids who had caught cow pox were immune from small pox.