Could this be what Q meant by Judgement Day?:
The $1.7billion represents money America owes Tehran following a 1970s arms deal with the shah's government that fell apart following the revolution there.
America refused to deliver $400million in arms to the new Islamic government, but held on to the money as well.
The remaining $1.3billion is interest that Tehran has charged on the money over the past 30 years.
The money came from a little-known fund administered by the Treasury Department for settling litigation claims.
The so-called Judgment Fund is taxpayer money Congress has permanently approved in the event it's needed, allowing the president to bypass direct congressional approval to make a settlement.
The U.S. previously paid out $278 million in Iranian claims using the fund in 1991.
http:// www.dailymail.co.uk/news/article-3777170/Obama-administration-admits-paying-entire-1-7billion-Iran-bill-CASH-little-known-fund-taxpayer-money.html