Commemorations across Britain and the United States marked the quarter-century anniversary of the attacks that killed nearly 3,000 people, with political leaders including Andy Burnham and former Prime Minister Tony Blair reaffirming the UK-US partnership whilst warning that terrorism remains a threat to democracy. Personal testimonies reflected the lasting toll: a British survivor of the South Tower collapse continues to grieve colleagues lost, having attended only 23 of the funerals, whilst first responders and senior officials recalled the horrors of that day and their ongoing determination to prevent future attacks.

The milestone also prompted difficult questions about the consequences of post-9/11 military interventions. Afghanistan war veterans expressed deep regret about their service, characterising the two-decade campaign as a pointless sacrifice as the Taliban rapidly regained control following Western withdrawal. Security-focused observers, including the former New York Fire Commissioner, renewed warnings about vulnerabilities in current border and immigration policies, arguing that inadequate controls risk recreating the conditions that originally enabled the terrorist threat.