There is also Hagerstown Airport in MD, which is used to get to Camp David.
"U.S. sent two more planeloads of cash, totaling $1.3 billion, to Tehran, reports The Wall Street Journal. The two planeloads, which passed through Europe on Jan. 22 and Feb. 5, followed the same route as the earlier payment, a congressional aide who was briefed told the Journal. In the first payment, an Iranian cargo plane picked up the money in Geneva."
fortune.com/2016/09/07/us-iran-billion-hostages-arms-deal/