It has been 25 years since the September 11, 2001 attacks, which shocked the world and reshaped global security policies. The 9/11 Commission Report, a detailed analysis of the events leading up to the attacks, revealed that intelligence systems had issued warnings—referred to as "blinking red"—but these were not fully understood or acted upon. The report also pointed out "failures of imagination" within institutions, meaning that officials were not adequately considering the possibility of such an attack. As a result, the commission called for a new approach to security, emphasizing the protection of critical infrastructure through a more integrated system. This new model involved combining different agencies, systems, and technologies to create a more cohesive security framework. One example of this approach is the UK’s Joint Terrorism Analysis Centre (JTAC), which brings together intelligence from various sources to analyze threats. Over the years, security measures have become more technological, with a focus on "layered security"—multiple levels of protection. High-profile locations such as airports, financial districts, and stadiums have been upgraded with features like biometric identification, full-body scanners, surveillance cameras, and armed patrols. These measures have been reinforced after each major attack, often by adding more integration, technology, and layers of protection. Despite these efforts and significant investment, the question remains: has this made us safer? While many experts believe the likelihood of a similar attack is low, some argue that the current security systems are not as effective as they appear. A new book titled The Empty Watchtower: Counterterrorism After 9/11 challenges the assumption that high-tech security is foolproof. Based on two decades of field research, the book argues that many systems are expensive, poorly coordinated, and vulnerable to failure. The authors studied the implementation of biometric security systems in airports and cities, observed counterterrorism training, and worked with surveillance units in Europe. Their findings reveal that security staff often lack understanding of the technology they use, cameras are sometimes improperly placed, and in some cases, control rooms are even used for storage. The focus on behavioral detection—using body language and facial expressions to identify potential threats—has also raised concerns. While some teams in European cities perform well, the effectiveness of these practices is hard to measure, given the rarity of actual terrorist attacks. This creates a risk of misinterpreting normal behavior, such as stress or fatigue, as suspicious. Additionally, advanced security systems have sometimes been applied in ways that target ordinary people, including vulnerable individuals who have not committed any crimes. In some cases, like the abandoned Project Champion in 2011, these systems were used in a way that disproportionately affected Muslim communities in Birmingham. The book highlights how even major terrorist attacks, like the 2016 Brussels airport bombing, have exposed weaknesses in the integration of technology and human systems. While technology and organization are vital to security, the authors argue that both have flaws. Technology is often overhyped, with its benefits assumed and its failures ignored. Examples include failed facial recognition projects, unstaffed control rooms, and AI-generated intelligence that lacks real-world accuracy. Ultimately, the authors found that the most successful security environments came from individuals who were proactive, skilled, and motivated—rather than relying solely on technology or systemic improvements. Fixing systemic issues remains difficult, especially when the solutions often involve refining the same systems that initially had problems.