On the American teenager who was kidnapped by Islamic militants while on vacation in the Philippines.

A history of how Tuareg separatists, jihadists seeking a “desert caliphate,” cigarette smugglers, and narcotraffickers have turned Northern Mali into “the globe’s most significant terrorist threat.”

A profile of Ayman al-Zawahri, the Egyptian doctor who became Bin Laden’s #2 and has now taken over Al-Qaeda.

A classified Guantánamo Bay interrogation log reveals the techniques used on Mohammed al-Qahtani, the so-called 20th 9/11 hijacker.

In the wake of 9/11, terrorist networks moved their recruitment and training efforts online, giving birth to Jihad-geeks like Irhabi_007.

In the days after 9/11, a photo of an unknown man falling from the South Tower appeared in publications across the globe. This is the story of that photograph, and of the search to find the man pictured in it.