Kerry defends $400 million payment to Iran, says U.S. does not pay ransoms

"The United States does not pay ransoms," Kerry told a news conference in the Argentine capital Buenos Aires. He said the payment, which was part of a longstanding Iranian claim at the Iran-US Claims Tribunal in The Hague, was negotiated on a separate track from the Iran nuclear deal.

(Reporting by Gram Slatery. Writing by Lesley Wroughton; Editing by Alden Bentley)