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EXPLAINER: What's happened to al Qaeda in the 25 years since 9/11?

A look at the evolution and current state of al Qaeda since the September 11 attacks.

MD

Mateo Dela Cruz

September 10, 20266 min read12 views
EXPLAINER: What's happened to al Qaeda in the 25 years since 9/11?
Memorial for 9/11 victims at the New York Fire Department Headquarters, September 8, 2026.
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In the quarter-century since the September 11 attacks, al Qaeda has transformed significantly, evolving from a centralized organization into a sprawling network of affiliates. Despite suffering setbacks, including the death of key leaders, it continues to inspire militant groups worldwide.

The Origins of Al Qaeda

Founded in the late 1980s by Osama bin Laden, al Qaeda emerged as a response to the Soviet invasion of Afghanistan. Bin Laden leveraged his wealth and connections to recruit fighters, establishing a base for jihadist ideology.

The group's declaration of jihad against U.S. forces in 1996 and subsequent attacks, including the bombings of U.S. embassies in Kenya and Tanzania, marked its rise as a significant global threat.

Leadership Changes Post-9/11

Following the 9/11 attacks that killed nearly 3,000 people, the U.S. invasion of Afghanistan led to the downfall of the Taliban, which had sheltered al Qaeda. Bin Laden evaded capture until 2011 when U.S. forces killed him in Pakistan.

Bin Laden’s successor, Ayman al-Zawahiri, was killed by a U.S. drone strike in Kabul in 2022.

Experts on Global Terrorism

Today, Seif al-Adel is believed to be the group's de facto leader.

Al Qaeda's Global Influence

Despite leadership losses, al Qaeda's influence has spread. The group has inspired deadly attacks in Bali, Madrid, and London, and its affiliates have established a presence in regions such as the Sahel and Somalia.

  • Al Shabaab in Somalia
  • Jama'at Nusrat al-Islam wal-Muslimin in the Sahel

Antonio Giustozzi, a senior research fellow, noted that while al Qaeda faced dislocation after 2001, its influence surged in subsequent years.

The Impact of Islamic State

The rise of Islamic State posed a significant challenge to al Qaeda. Following a split in 2014, IS established a caliphate in Syria and Iraq, leading to fierce competition between the two organizations.

The Nusra Front, originally an al Qaeda affiliate, broke away and has since become a major player in the Syrian conflict.

Current Operations and Future Risks

Today, al Qaeda remains active, particularly in Africa and parts of South Asia, where it has established strongholds. A recent U.N. report indicates that al Qaeda continues to receive support from the Taliban government in Afghanistan.

Experts warn that while al Qaeda may not operate at its peak capacity, it remains a potent threat, adapting its strategies and relying on a decentralized network of operatives.

Understanding al Qaeda's evolution is essential for global security efforts, as its ideology continues to resonate with various militant groups.