Terrorists have significantly changed their modus operandi in the new millennium. Until 2001, vehicle-borne devices targeting major financial or political centres used to be the hallmarks of international urban terrorism. These have more recently been superseded by person-borne devices – especially suicide attacks – and subsequently Fedayeen-style mass shootings, targeting of crowds with fast-moving vehicles, as well as low-tech, difficult-to-defend knife attacks. [...]
Many have advocated the use of crime-prevention ideas for dealing with the terrorist threat. These manipulate the built environment to reduce the attractiveness and physical access to target places while increasing the likelihood of being caught. In essence this means the mass use of security bollards and high-visibility policing.
While this might reassure many citizens, the emphasis on structures and deterrence models has limited use. Terrorists seeking martyrdom could simply move to other locations that are not as well defended. [...]
The fourth issue relates to aesthetics. Over recent decades, urban revitalisation has increasingly emphasised inclusivity, liveability and accessibility. These “quality of life” values sit uneasily beside concerns to “design out terrorism” as security becomes part of the design process. [...]
More broadly, counter-terrorism measures deployed in crowded public places must seek to balance security effectiveness with social and political acceptability. We live in dangerous times, but how we react to the risk of terrorism will have impacts on our public realm for many years. In many ways the threat to cities comes as much from our policy responses as the actual act of terrorism. Both have the potential to harm the freedom of movement and expression that define a vibrant city.
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