On the 25th anniversary of the September 11 attacks, a sobering assessment of Western counter-terrorism and intelligence strategies suggests that while critical lessons have been internalized, significant gaps in imagination and strategic foresight remain.
The attacks, which killed 2,977 people, represent what the subsequent 9/11 Commission Report described as a colossal failure of imagination. At the time, both the CIA and the FBI possessed fragmented intelligence regarding al-Qaeda and its leader, Osama bin Laden, but failed to connect the dots or share information effectively. Nine days after the towers fell, President George W. Bush declared the global “War on Terror.”
Since then, the landscape of intelligence cooperation has undergone a radical transformation. In the UK, historic rivalries between domestic agencies have been replaced by integrated operational centers, such as London’s Counter Terrorism Operations Centre, where MI5 officers, police specialists, and US federal agents work side-by-side. Similarly, the US established the National Counter Terrorism Center and the post of Director of National Intelligence to streamline data sharing across its 18 intelligence agencies. The alliance between the CIA and MI6 is now regarded as the closest in the world, bolstered by the Five Eyes pact.
However, disastrous strategic failures have persisted. The invasion of Iraq in 2003 was predicated on flawed intelligence regarding weapons of mass destruction, a scandal that severely damaged MI6’s reputation. Although the agency subsequently overhauled its assessment processes to separate field intelligence gathering from analytical verification, critics argue that broader strategic lessons were ignored.
Former military leadership has been vocal about these misses. General Sir Richard Shirreff, who commanded divisions in Iraq, noted that the war was based on deeply flawed intelligence and expressed skepticism about the institution’s ability to learn from such errors. Meanwhile, Lord Jonathan Evans, who led MI5 from 2007 to 2013, highlighted ongoing challenges in prioritizing leads, citing the agency’s failure to prevent the 2005 London bombings and the 2017 Manchester Arena attack.
The threat profile has also shifted dramatically. While non-state terrorism remains a concern, former MI6 chief Sir Alex Younger admitted that Western agencies spent two decades focused almost exclusively on counter-terrorism, thereby missing the rapid militarization of China and the resurgence of Russia. These state actors have since developed hypersonic missile capabilities that challenge NATO’s traditional military advantages.
Human rights concerns also continue to cast a long shadow. The post-9/11 era saw the establishment of detention camps at Guantanamo Bay and controversial rendition programs involving allies like Libya. Although some abuses have been addressed, including a 2018 apology from the UK government regarding the abduction of Abdelhakim Belhaj, the practice of detention without trial persists. Recent events, such as the US deportation of detainees to El Salvador in 2025, indicate that ethical debates over security measures remain unresolved.
As the world marks this milestone, the central question remains whether intelligence communities have fully matured beyond the reactive postures that defined the early 21st century.
The Iraq WMD failure really did set back trust in intelligence agencies for years. It is amazing they have managed to rebuild that credibility at all.
Ten years after 9/11 I felt we were safer. Twenty-five years on, the threats just seem more complex and harder to pin down.
Intelligence sharing has improved, but the human cost of these security measures remains a painful, unresolved ethical wound across the West.
Did anyone else notice the specific mention of the 2025 deportations to El Salvador? That feels oddly specific for an anniversary piece.
It is terrifying how much focus was placed on non-state actors while state threats like Russia and China grew unchecked. A massive blind spot indeed.