“London’s Imperial War Museum has an outstanding track record in staging hard-hitting exhibitions, with Peter Kennard’s photo-montages and Edward Barber’s documentary photographs being two very recent examples. Added to the roster is this disturbing new show of work by award-winning artist Edmund Clark. War of Terror, which runs until August next year, focuses on the measures states take to counter perceived terrorist threats and the malign impact they have on all our lives and explores the experience of people in Britain suspected — but never convicted — of terrorist-related offences in the interminable “war on terror.””