Five US citizens detained in Iran were fl own out of that country on Monday as part of a prisoner swap mediated by Qatar in whichWashington also ended a freeze on $6 billion of Iranian funds. The deal-following two years of backchannel talks-removed a major source of friction between the adversaries. Broad outlines ofthe agreement had already been announced on Aug. 10. It's unclear whether it can lead to progress on other issues, however.
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