Stephen Graham is Professor of Human Geography at the University of Durham and Deputy Director of the Centre for the Study of Cities and Regions (http://www.dur.ac.uk/cscr/) He is also Associate Director of the International Boundaries Research Unit (http://www.dur.ac.uk/ibru/). Over the last fifteen years Professor Graham's research has sought to understand the relations between urban places and mobility, infrastructure and technology on the one hand, and war, surveillance and geopolitics on the other. In particular, his recent work has explored the ‘splintering’ of urban spaces and infrastructures, mobilities and cities; the implications of new media technologies for urban life; and the proliferation of urban surveillance systems which are increasingly automated through computer software. Emerging work is addressing the connections between cities and critical geopolitics. Themes here include: how global urbanisation is affecting military doctrine; how the ‘war on terror’ impacts on cities; the ways in which infrastructures are targeted by political violence; and how the 'surge' of surveillance since 9/11 is impacting on urban life.