Key facts
- The 9/11 attacks resulted in 2,977 deaths.
- US intelligence agencies failed to connect available information prior to 9/11.
- Reforms since 9/11 have improved information sharing between Western intelligence agencies.
- The 2003 Iraq War was based on "deeply flawed intelligence", according to General Sir Richard Shirreff.
- MI5 was aware of the ringleader of the 7/7 London bombings but failed to prevent the attack.
- State threats from Russia, Iran, and China are now considered as severe as non-state terrorism.
Twenty-five years after the September 11, 2001 attacks, the lessons learned from that day continue to shape global security and intelligence strategies. The attacks, which killed 2,977 people, were a catastrophic failure of imagination and coordination within the US intelligence community, despite prior awareness of al-Qaeda and its leader, Osama Bin Laden. The subsequent "War on Terror" defined foreign and security policy for two decades.
In the aftermath, reforms were implemented to improve intelligence sharing between agencies like the CIA and FBI, and internationally through alliances such as Five Eyes. The UK established a Counter Terrorism Operations Centre, and the US created a National Counter Terrorism Center and a Director of National Intelligence. These changes have led to numerous foiled plots and arrests.
However, significant failures have persisted. The intelligence used to justify the 2003 invasion of Iraq was found to be deeply flawed, leading to reputational damage for MI6 and reviews like the Butler Review. MI5 also faced criticism for failing to prevent the 7/7 London bombings and the Manchester Arena bombing, despite having identified individuals involved.
More recently, the intelligence and strategic planning surrounding state threats from Russia, Iran, and China have been questioned. The decision by US President Donald Trump to attack Iran was described as a failure of intelligence imagination, with allies warning of potential retaliation that could disrupt global energy markets. The article suggests that while non-state terrorism remains a concern, state-level threats are now considered equally severe.