Smoke pours from the  World Trade Center in New York after it was struck by two planes during  the September 11th attacks in 2001: 15 of the 19 people involved in the attacks were Saudi citizens. Photograph: David Surowiecki/Getty Images

Twenty-eight pages of the 2002 joint congressional inquiry into 9/11 lie in a guarded vault in the basement of the US Capitol building. Former presi(...)

Brothers  Brahim El Bakraoui (left) and Khalid El Bakraoui, identified as two of the suicide bombers in the Brussels attacks. Experts warned that extremists were trying to recruit entire families in Europe, portending the possibility of yet another evolution in jihadism. Photograph: EPA/Interpol

The identification of Khalid and Ibrahim El Bakraoui as suicide bombers in the deadly Brussels attacks is confronting investigators and counterterror(...)