Barack Obama's touching tribute to Ellen DeGeneres at Medal of Freedom ceremony

US President Barack Obama hosted his final Presidential Medal of Freedom Ceremony – the nation's highest civilian honour – at the White House on Tuesday, 22 November, celebrating 21 individuals for their contribution to the US.Bringing star appeal to the event were Robert De Niro, Ellen DeGeneres, Diana Ross, Tom Hanks, Bruce Springsteen, Michael Jordan and Robert Redford, who were all felicitated for their service to America.