Reports

Authored by Alexander Meleagrou-Hitchens, Seamus Hughes, and Bennett Clifford
February 2018

This study reflects the most comprehensive, publicly available accounting of Americans who traveled to join jihadist groups in Syria and Iraq since 2011. It identifies 64 travelers, the largest available sample to date. These individuals, and their stories, were uncovered during a multi-year investigation. Authors interviewed law enforcement officials, prosecutors, and defense attorneys, and attended relevant court proceedings. Additionally, they reviewed thousands of pages of legal documents, filing information requests and federal court motions to unseal records where necessary. Finally, the authors conducted several interviews with American travelers who returned from the territories held by the Islamic State (IS).

Authored by Audrey Alexander
October 2017

Until 2016, Twitter was the online platform of choice for English-language Islamic State (IS) sympathizers. As a result of Twitter’s counter-extremism policies - including content removal - there has been a decline in activity by IS supporters. This outcome may suggest the company’s efforts have been effective, but a deeper analysis reveals a complex, nonlinear portrait of decay. Such observations show that the fight against IS in the digital sphere is far from over. In order to examine this change over time, this report collects and reviews 845,646 tweets produced by 1,782 English-language pro-IS accounts from February 15, 2016 to May 1, 2017. This study finds that Twitter’s policies hinder sympathizers on the platform, but counter-IS practitioners should not overstate the impact of these measures in the broader fight against the organization online.

Authored by Sarah Gilkes
December 2016

While there has been a relative surge in the number of U.S. persons radicalized and recruited by the Islamic State in the last five years, other jihadist organizations, primarily al-Qaeda, remain popular and active. This suggests that, while group affiliation matters, the draw of the wider Salafi-jihadist ideology that al-Qaeda, IS, and other like-minded groups adhere to is equally important when analyzing the jihadist threat to America.

Authored by Audrey Alexander
November 2016 

The self-proclaimed Islamic State and other jihadist actors have identified several unique roles for Western women in their radicalization and recruitment efforts. This report finds that, while few conduct violent plots, many disseminate propaganda, donate resources, or travel abroad to offer their support. This report uses a wealth of primary and secondary data to examine the efforts of 25 jihadi women in America from January 2011 to September 2016. 

Authored by Lorenzo Vidino and Seamus Hughes
December 2015

The report consists of two parts. The first examines all cases of U.S. persons arrested, indicted, or convicted in the United States for IS-related activities. This section also looks at the cases of other Americans who, while not in the legal system, are known to have engaged in IS-inspired behavior.

The second examines various aspects of the IS-related mobilization in America. It analyzes the individual motivations of IS supporters, the role of the Internet—in particular, social media—in their radicalization and recruitment processes, whether their radicalization took place in isolation or with like-minded individuals, and the degree of their tangible links to IS.