The article by Katharina Ciax and Simon Runkel analyses how security and counter-terrorism policies transform not only the physical configuration of urban spaces but also their emotional and perceptual dimensions. The case study is Breitscheidplatz square in Berlin, the scene of the vehicle attack during the Christmas market in 2016.

The authors start from a key idea: security is not only implemented with infrastructure and police presence, but also produces an affective atmosphere that modifies the way people experience public space. This connects with the field of everyday urban geopolitics, which studies how the grand discourses on global security take shape in specific spaces such as streets and squares.
Before the attack, Breitscheidplatz was a space characterised by a constant flow of people, surrounded by commercial axes and close to the Bahnhof Zoostation. Although control and surveillance practices had existed since the 1990s – especially linked to the criminalisation of certain groups – the 2016 attack marked a turning point.
After the attack, the square underwent a profound transformation with the installation of Hostile Vehicle Mitigation (HVM) measures: concrete blocks, bollards, reinforced street furniture, and a more visible police presence, including a permanent mobile police station. This set of measures transformed the square into a space equipped with a high level of safety, practically unique in Berlin in its level of fortification.
The authors argue that this accumulation of measures not only responds to a functional need for protection but also generates an oversaturation of excessive security that alters the very essence of public space.
One of the central concepts of the article is that of affective atmosphere. Security is not perceived solely through rules or material devices, but through sensations: hostility, constant surveillance, tension, or exclusion. Crossing multiple physical barriers before reaching the square can create a sense of latent threat even though the aim is precisely to reduce risk.
Through sensory ethnographies and participant observation (between 2021 and 2022), the researchers collected testimonies and impressions from users, traders, and neighbours. What emerges is a paradox: the measures aimed at increasing security can create an atmosphere that reinforces the perception of danger.
This transformation particularly affects racialised or marginalised groups. According to the authors, excessive security is not neutral: it reinforces pre-existing discriminatory practices and restricts the actual accessibility of public space. The square ceases to be an open space where people are free to move around and becomes a space of selective control.
The article places this case within a broader framework: the excessive security of European cities following waves of terrorist attacks. This process has driven the militarisation of urban space, the normalisation of defensive infrastructures, and the symbolic construction of internal threats.
In Breitscheidplatz, the combination of luxury consumption, intensive care, and defensive architecture contributes to redefining the identity of the space. The square is not only a place of remembrance of the attack, but also a permanent stage for proactive prevention.
This dynamic shows how global geopolitics (terrorism, European security, discourses on the threat) translates into very concrete decisions regarding urban design, furniture, and police presence. Public space thus becomes a laboratory for the governance of fear.
The main contribution of the article is to demonstrate that security policies have an inseparable material, social, and emotional dimension. Excessive security not only reorganises space but also transforms the way people live and feel.
For the field of urban security, this involves various reflections:
- Physical protection measures generate symbolic and psychological impacts.
- A lot of security can reinforce the perception of risk.
- Security can become a mechanism of social exclusion.
- Public space can lose its function of openness and coexistence if it becomes permanent defence infrastructure.
Ultimately, the Breitscheidplatzcase shows how contemporary anti-terrorism not only protects but also redefines the urban experience. Security ceases to be an invisible element and becomes a tangible, material, and atmospheric presence that shapes daily life.
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