Muhammad Youssef Abdulazeez (1990-2015) was an Islamist extremist who opened fire at two military sites in Chattanooga, Tennessee on July 16, 2015, killing four Marines and a Navy sailor. Abdulazeez, a Kuwaiti-born U.S. national, is believed to... Read more

Mujahid is the Arabic term for someone undertaking jihad. Many Islamist extremists will refer to themselves as the mujahideen (the plural of mujahid) to evoke religious meaning to their violence. In particular, this term is used to... Read more

Mullah Mohammed Omar (1960-2013) was the founder of the Taliban. He was born in Khakrez, Afghanistan in 1960. Starting in 1994, the Taliban began to seize large parts of Afghanistan, and Mullah Omar was appointed as head... Read more

Najibullah Zazi is an Afghan-American who drove from his home in Colorado to New York City on September 9, 2009 with the intention of detonating explosives above the New York City subway during rush hour as part... Read more

In the incel community, a "normie" is a someone of average attractiveness and/or intelligence. "Normies" are viewed by incels as superior and in the incel hierarchy, "Normies" fall between "Chads" and "incels."

Nutella and kittens was among ISIS's more inventive and disturbing media tactics. In 2015, the group paired calls to join the Islamic State with innocuous images that were popular on the internet, including pictures of kittens or... Read more

Omar Shafik Hammami (1984-2013), aka Abu Mansoor al Amriki, was an American foreign terrorist fighter who traveled to Somalia to join al Shabaab. Hammami was raised as a Christian in Alabama and converted to Islam sometime during... Read more

The June 2016 shooting spree at the Pulse nightclub in Orlando, Florida, by Omar Mateen—who killed 49 people and wounded 53 more—dwarfed in its lethality all other extremist-related murders in the decade. Mateen, who claimed his attack... Read more

Osama bin Laden (1957-2011) is perhaps the most influential and infamous terrorist leader in history. He originally became involved in the jihadist sphere when he traveled to Pakistan from his home in Saudi Arabia to help organize... Read more

Palestinian Islamic Jihad is a radical Islamist terrorist organization, established by Egyptian students inspired by the 1979 Iranian revolution. PIJ's goal is the violent destruction of the state of Israel, and like Hamas it frequently attacks Israeli... Read more