Three-part series charting the development of Britain's airports and how they have transformed the country, in the process creating both freedom and fear. The final part takes us from the open, easily accessible airport of late 1960s to one besieged by present day security procedures and climate protesters. Using rare archive and eye-witness accounts, it reveals the events that have shaped our experience and view of the modern airport. Contributors include Lord Foster, Jonathan Glancey and Will Self.