WikiLeaks founder Julian Assange has returned home to Australia to start life as a free man after admitting he revealed US defence secrets in a deal that unlocked the door to his London prison cell. Assange landed on a chilly Canberra evening on Wednesday in a private jet, the final act of an international drama that led him from five years in the high-security Belmarsh prison in Britain to a courtroom in a US Pacific island territory and, finally, home.