U.S. Held Cash Until Iran Freed Prisoners An Iranian cargo plane left Geneva with $400 million in cash after a flight with Americans aboard took off from Tehran in January By Jay Solomon and Carol E. Lee Aug. 17, 2016 5:27 p.m. ET WASHINGTON—New details of the $400 million U.S. payment to Iran earlier this year depict a tightly scripted exchange specifically timed to the release of several American prisoners held in Iran, based on accounts from U.S. officials and others briefed on the operation. U.S. officials wouldn't let Iranians take control of the money until a Swiss Air Force...