maybe it was weighed down with some of O'Barry's Petty Cash?

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.

The Obama administration had claimed the events were separate, but recently acknowledged the cash was used as leverage until the Americans were allowed to leave Iran. The remaining $1.3 billion represented estimated interest on the Iranian cash the U.S. had held since the 1970s. The administration had previously declined to say if the interest was delivered to Iran in physical cash, as with the principal, or via a more regular banking mechanism.

https://apnews.com/united-states-government-fd4113419276444eba1d2a46d5c29752