It was the year that brought back Donald Trump to political power. The year that saw the Tory’s lose power after 14 years. The year that saw war spread across the Middle East from Gaza to Lebanon. And that brought joy in the shape of the Olympics, a Brat summer and the announcement of an Oasis reunion. Katharine Viner, the Guardian’s editor-in-chief, tells Helen Pidd about what these huge changes looked like from the editor’s chair. She explains how it felt to watch Labour win the UK elections: “The Guardian has shown through its reporting just how desperate life is