This week, Norman Foster joined Bloomberg, Mike Bloomberg, Patti Harris, and Dean Sarah Whiting from the Graduate School of Design at Harvard University to welcome the eighth class of mayors to the Bloomberg Harvard City Leadership Initiative. This yearlong professional management training programme, housed at the Bloomberg Center for Cities at Harvard, was established by Bloomberg Philanthropies, Harvard Kennedy School, and Harvard Business School. It is the first of its kind to close the gap in executive development for the public sector.