Professor Michael Clarke: 9/11 Marked A 'Change of Era'

As part of our series of videos reflecting on 20 years since the 9/11 attacks, RUSI Distinguished Fellow and former Director-General Professor Michael Clarke reflects on the long-term effects of these seminal events on UK defence and foreign policy.

Professor Clarke highlights the strategic impact of terrorism now and considers what future historians might make of this ‘change of era’.

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The 9/11 Attacks, 20 Years On

Two decades on, we reflect on the profound impact the 9/11 attacks had on security and global strategy.


Professor Michael Clarke

Distinguished Fellow

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