STREAMING DEVICE.. >> CHRIS WARREN, THANK YOU VERY MUCH. >>> IN A SURPRISE DEAL IRAN AGREED TO PARDON AND RELEASE FIVE PRISONER INS IN EXCHANGE THE U.S. WILL RELEASE BILLIONS OF DOLLARS IN FROZEN FUNDS. ONLY THREE OF THE PRISONER INS HAVE BEEN IDENTIFIED SO FAR. THEY HAVE BEEN SUGGESTING A PRISONER IN SWAP BETWEEN IT AND WASHINGTON FOR MONTHS. HERE IS MARGARET BRENNAN. >> Reporter: THESE FIVE PRISONER INS WERE TRANSFERRED TO HOUSE ARREST. SECRETARY OF STATE, BLINKEN. >> I BELIEF IT IS THE BEGINNING OF THE END OF THEIR NIGHTMARE. >> FOR YEARS THE DETAINEE'S FAMILIES URGED THEM TO JUST BRING THEIR LOVED ONES HOME. >> MY DAD IS JUST A DAD. LET HIM COME HOME. >> Reporter: THIS BUSINESSMAN WAS TAKEN IN 2018. SO WAS ENVIRONMENTAL LIFT TAHBAZ. THE BROTHER OF NAMAZI, IMPRISONED IN 2015, CALLING THE LAST EIGHT YEARS HORRIFIC. TWO OTHER AMERICANS WHOSE NAMES ARE WITHHELD WILL BE RELEASED. THE BREAKTHROUGH COMES AMID TENSION. EARLIER THIS SUMMER THE U.S. SENT WARSHIPS TO THE GULF AFTER A IRAN ATTEMPTED TO SEIZE SHIPS. THEY ARE CALLING IT DELICATE. >> IN EXCHANGE THEY WILL BE ABLE TO ACCESS $6 BILLION IN A ACCOUNT IN SOUTH KOREA. THEY WILL BE TRANSFERRED. ONCE THERE, IRAN WILL USE THE FUNDS FOR PUNCHES PERMITTED UNDER U.S. SANCTIONS. >> AND NOW MORE FROM WASHINGTON, YOU SAID THAT THEY COULD BE AS HOME AS SOON AS SEPTEMBER, HOW DOES THAT WORK? >> Reporter: WELL, JEFF IT IS DELICATE AND COMPLICATED. A LOT DEPENDS ON IN ALL OF THE NEXT FEW STEPS IN THIS ROAD MAP GO THROUGH WITHOUT A HITCH. WHAT IRAN EXPECTS IS FOR THE U.S. TO BE FACILITATE THE TRANSFER OF $6 BILLION FROM RESTRICTED ACCOUNT IN SOUTH KOREA TO MORE EASILY ACCESSIBLE RESTRICTED ACCOUNT IN KATAR AT WHICH POINT THAT MONEY THEY CAN USE FOR ITEMS THAT ARE APPROVED UNDER THE U.S. SANCTIONS REGIME. THAT HAS TO HAPPEN. I AM TOLD THAT WILL TAKE WEEKS FOR IT TO ACTUALLY GO THROUGH THAT PROCESS. THE U.S. TREASURE IS OVERSEEING THE TRANSACTIONS IN THE MEANTIME THE AMERICANS ARE GOING TO BE LIVING IN THIS HOUSE ARREST SITUATION. APPARENTLY IN A HOTEL UNDER GUARD. AND, THEN, IN ABOUT 4-6 WEEKS WE MAY BE ABLE TO SEE THEM RETURN TO U.S. SOIL. BUT, WE ALREADY KNOW THAT THERE ARE DIFFERENCES IN HOW THE TWO COUNTRIES ARE DESCRIBING THIS DIPLOMATIC ARRANGEMENT. THE UNITED STATES IS SAYING IT IS VERY MUCH STILL AN ACTIVE NEGOTIATION AND PROCESS. SO, I WOULD NOT BE SURPRISED TO SEE MORE ADD-ON TO THIS ARRANGEMENT AS IRAN POTENTIALLY TRIES TO EXTRACT OTHER CONCESSIONS IN EXCHANGE FOR LETTING THESE AMERICANS GET ON A PLANE AND RETURN HOME. >> WHAT A SURPRISE THEY ARE TALKING ABOUT IT IN DIFFERENT WAYS. IS IRAN SAYING ANYTHING ELSE ABOUT THE AGREEMENTS? >> YES, JEFF, SIGNIFICANTLY THE U.N., THE IRANIAN OFFICIAL AT THE U.N. WHO SPEAKS ON BEHALF OF HIS COUNTRY IN THE UNITED STATES. IN FACT, THE ONLY DIPLOMATIC REPRESENTATION THEY HAVE IN AMERICA TOLD ME THIS AFTERNOON THAT THEY DO EXPECT THIS TO BE RESIPRICAL. THEY CLAIM THEY HAVE AN AGREEMENT WITH THE UNITED STATES TO RELEASE FIVE IRANIANS HELD IN U.S. CUSTODY HERE. THE U.S. GOVERNMENT AT THIS POINT IS NOT CONFIRMING THAT AND IS SAYING THAT THERE ARE NO RELEASES HAPPENING FOR U.S. CUSTODY AT THIS POINT. I WOULD WATCH THIS SPACE. LAST TIME WE SAW THIS KIND OF SIGNIFICANT TRANSACTION TAKE PLACE BACK IN 2016 THERE WAS A PRISONER IN EXCHANGE. SO, I WOULD WATCH FOR THAT DETAIL. I WOULD WATCH CAREFULLY HOW THE TWO SIDES DESCRIBE THE FUNDS THAT BECOME AVAILABLE. $6 BILLION IS WHAT THE OFFICIALS ARE CONFIRMING WILL BE TRANSFERRED FROM SOUTH KOREA. I AM ALSO HEARING FROM OTHER SOURCES THAT THERE MAY BE OTHER FUNDS AND TONIGHT THEY ARE REPORTING THAT ADDITIONAL FUNDS WILL BE RELEASED FROM IRAQ TO OMAON. NOW, THEY ARE NOT DETAILING THAT AND THE U.S. IS NOT CONFIRMING IT. BUT THERE IS GOING TO BE A LOT OF POLITICAL HEAT AROUND THIS, NO DOUBT, AS YOU KNOW, JEFF, GOING INTO AN ELECTION YEAR. WE ARE ALREADY SEEING SOME OF THE REPUBLICAN CANDIDATES HEAVILY CRITICIZE PRESIDENT BIDEN, THE JUSTIFICATION, OF COURSE, ON BEHALF OF THE ADMINISTRATION IS BRINGING HOME 5 AMERICANS TO THEIR FAMILIES. >> AND THE LAST TIME THIS HAPPENED SEVEN YEARS AGO THE RUN OFF TO
