John Rizzo
(born 1948) was a lawyer at the Central Intelligence Agency for 34 years.
Brendan Simms
Brendan Simms is professor in the history of international relations at the University of Cambridge.
Europe: the Struggle for Supremacy – 1453 to the Present (2013)
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Luke Delaney
He has now left the police force and to become a full-time writer.