for the pbs newshour, this isho fred de sam lazaro, in cochin, india. >> woodruff: fred's reporting is a partnership with the under- told stories project at the university of st. thomas in minnesota. >> ifill: the iran nuclear deal has been a major issue in this year's presidential election.ct detractors blame hillary clinton and the obama administration foi caving to iranian demands, while receiving little in return. now, revelations about u.s. payments to the iranian government add a new wrinkle to those critiques. hari sreenivasan has more. >> sreenivasan: this week, the "wall street journal" broke news that the obama administration secretly air-lifted $400 million in cash to iran. the money was owed as part of a failed arms deal prior to thede 1979 islamic revolution. but the payment coincided within the release of four americans imprisoned in tehran, raising questions about cash for prisoners.si donald trump criticized the move today at his rally in portland, maine. >> $400 million in cash being flown in an airplane to iran. i wonder where that money really goes by the way, right.