Technology threatens to transform warfare more than almost any other human activity. But what does the future of war look like in the 21st century? Presenters Timandra Harkness and Leo Johnson hear from those helping to design and build new weapons systems, experts in military strategy and defence policy, and those like veteran war photographer Don McCullin who have experienced the full horror of war, to explore what might change when the technology revolution of today is applied to the conflicts of the century ahead. Producer: Jonathan Brunert.