Let me help you out, seeing as research doesn't appear to be one of your strong points.
"The $1.7 billion was the settlement of a decades-old arbitration claim between the U.S. and Iran. An initial $400 million of euros, Swiss francs and other foreign currency was delivered on pallets Jan. 17, the same day Tehran agreed to release four American prisoners."
Well look at that. 400 million dollars of Iranian money. But wait, there's more:
"The remaining $1.3 billion represented estimated interest on the Iranian cash the U.S. had held since the 1970s."
Well isn't that something. It's amazing what you can discover when you open your eyes.
