US and Iran agree prisoner swap

Siamak Namazi, Emad Shargi and Morad Tahbaz and two un-named US Iranian dual nationals were released to house arrest in Iran, which could lead to their eventual repatriation to the US. Also on the programme: President Biden has declared that a major disaster exists in the State of Hawaii; and we hear how research on lizards could offer insights into the treatment of osteoarthritis. (Image: US-Iranian Siamak Namazi is among those freed from Evin prison under the deal, Credit: Free the Namazis)