channel 9 anchor jorge estevez has been following this. and these investigations took 14 months to complete. >> 1.7 billion dollars to iran settling a 30-year debt. family members of these guys here, of course, say it was worth them to get them back. five americans are free at last. >> we're overjoyed that he's out. >>reporter: a boston university first to return home. he arrived in massachusetts, after being detained for 40 days in iran. where he'd been teaching. meanwhile, 3 of the exprisoners are now getting much needed medical treatment, at a u.s. military base in germany. their first stop out of iran, was switzerland. where washington post reporter jason rezaian, met the u.s. official who helped negotiate his release. rezaian was held for more than a year and hey half on charges. >> he's doing okay, i mean, he's, you know, mostly been neglected for a long time. >>reporter: former marine, amir, here with his family, spent more than 4 years in iranian prison. his sister beamed with joy at the news he was free. >> we are looking forward