This month we hear from United States urban planner Ryan Gravel, who is visiting Christchurch to talk about how catalyst projects can transform cities. Ryan tells us about how his student research provided the original vision for the Atlanta BeltLine, one of the most successful and inspiring urban redevelopment programmes underway in the US. We then have an excerpt from a presentation by international business journalist Rod Oram, called Reinventing Paradise: the transformational power of the residential red zone