Mark Colvin was one of Australia's most beloved and respected journalists and broadcasters. In an award-winning career spanning more than four decades, he covered major events for the ABC at home and as a foreign correspondent. For the last twenty years, he was a familiar voice as the presenter of ABC radio's current affairs program PM. He was a master interviewer, and a prolific contributor to the Twittersphere. On 11 May 2017, Mark died aged 65 after struggling with a rare auto-immune disease for more than 20 years. He is greatly missed. In a very special free event, Peter Greste, Jonathan Holmes, Sally Heath and James Jeffrey — some of Mark's closest friends and colleagues — pay tribute to the great @Colvinius