Terrorism & extremism, explained.

A tribute in New York City on the 20th anniversary of the terror attacks of 11 September 2001 which destroyed the Twin Towers of the World Trade Centre (Alexi Rosenfeld/Getty Images)
The very personal legacy of Ayman al-Zawahiri
I was twice an enemy to al-Qaeda’s leader, both near and far. His influence in seeding militant Islamists was profound.




