This IntelBrief was part of a special series marking the 20-year anniversary of the attacks of September 11, 2001 in the United States, which catalyzed a global response to emerging terrorist threats. This series offers analysis and insights from experts and practitioners on the lasting impacts of 9/11 around the world and the ensuing response as well as the evolution of terrorist threats.

July 30, 2021

IntelBrief: The Evolution of the Global Jihadist Movement from a One-Headed Monster to a Hydra

When Osama Bin Laden and Khalid Sheikh Mohammed orchestrated the al-Qaeda terrorist attacks on the United States homeland on 9/11, it was a watershed moment for the global jihadist movement.



August 2, 2021

IntelBrief: The Limitations of Security Force Assistance in Countering al-Qaeda in Africa

Since the attacks of September 11, 2001, Africa’s security relevance to the international community has grown, in large part due to the emergence of three al-Qaeda affiliates and the more recent expansion of the so-called Islamic State (IS) on the continent.



August 6, 2021

IntelBrief: Negotiating out of Counterterrorism in the Sahel

With Africa becoming the epicenter of jihadist activity globally, al-Qaeda in the Islamic Maghreb’s (AQIM) Sahel affiliate, Jamaat Nusrat al-Islam wal Muslimin (JNIM), has continued to evolve into a political and military force in the region.



August 9, 2021

IntelBrief: Expanding Priorities in South Asian Security Two Decades After 9/11

As American troops draw down in Afghanistan—leaving open-ended a two-decade Global War on Terror catalyzed by the attacks in the United States on September 11, 2001—their departure poses a critical question for India and its neighbors.



August 13, 2021

IntelBrief: Human Rights Abuses and the War on Terror in South Asia

Authoritarian regimes have appropriated the rhetoric of the Global War on Terror and used related terrorism legislation to justify repressive actions.



August 16, 2021

IntelBrief: Deep Roots and Recent Boosts: The Evolution of the Terrorist Landscape in Southeast Asia After 9/11

The attacks of September 11, 2001 have strongly shaped the evolution of the global security threat landscape in Southeast Asia.



August 20, 2021

IntelBrief: The Past, Present, and Future of Al-Qaeda in Afghanistan and Pakistan

In the last two decades, massive efforts of the so-called Global War on Terror (GWoT) in the Afghanistan-Pakistan (AfPak) region resulted in severe blows to al-Qaeda. However, the group maintains deep, covert roots in the AfPak’s jihadist landscape, ensuring its longevity in the region.



August 23, 2021

IntelBrief: The Turkish Counterterrorism Factsheet Two Decades after 9/11

Of the countries most affected by the tragic attacks of September 11, 2001, Turkey quite likely makes the top five. The country not only experienced al-Qaeda-linked attacks and arrests in 9/11’s aftermath, but also dealt with the secondary consequences of the attacks with respect to Turkey’s regional policies; domestic terror incidents; local, regional, and global counterterrorism efforts; and the country’s foreign military and diplomatic engagement.



September 7, 2021

IntelBrief: The Legacy of 9/11 in Norway and Northern Europe: An Evolving and More Multifaceted Landscape

September 11, 2001, significantly impacted not only United States society, but continues to have profound geopolitical repercussions around the world. The Nordic countries’ contributions to the subsequent wars in Afghanistan, Iraq, and Syria dominated the foreign policy debate in these countries and brought foreign policy into domestic discourse.



September 13, 2021

IntelBrief: What Does the 20th Anniversary of 9/11 Mean for UK Counterterrorism?

The future of UK counterterrorism will reflect the way that US, and hence UK, foreign policy has evolved over time. The 20th anniversary of the 9/11 attacks not only marked the end of two decades since those dreadful events, but also the possible end of the much vaunted “War on Terror” started by President George W. Bush in the fall of 2001.