Hostage diplomacy: when will Nazanin Zaghari-Ratcliffe be free?

Nazanin Zaghari-Ratcliffe has endured a five-year nightmare after being arrested and jailed in Iran while on holiday. But now as her husband, Richard Ratcliffe, and the Guardian’s Patrick Wintour explain, having served her sentence she is being threatened with further charges. Help support our independent journalism at <a href="https://www.theguardian.com/infocus">theguardian.com/infocus</a>