Newsroom edition: ‘alert but not afraid’, the changing nature of terrorism

The Australian government has raised the terrorism threat level from possible to probable. No single issue or ideology led to this rise, but as extremism spreads online – and in our communities – how concerned should we be? Bridie Jabour speaks to Guardian Australia’s head of news, Mike Ticher, and deputy editor Gabrielle Jackson about why the threat of terrorism is rising around the world and what we can do to stop it