Julian Assange, one of the world’s most notorious hackers and the face of the website Wikileaks, is now a free man. He’s been in a high security prison in the UK for the last five years, fighting extradition to the US, wanted for charges under the US Espionage Act. But who is he and what did he do?

We talk you through Julian Assange’s hacker background, some of Wikileaks' biggest revelations and controversies and how he ended up living at the Ecuadorean embassy in London for nearly seven years.

Instagram: @bbcwhatintheworldWhatsApp: +44 0330 12 33 22 6Email: whatintheworld@bbc.co.ukPresenter: Alex RhodesProducer: Julia Ross-Roy and Maria Clara MontoyaEditor: Verity Wilde