Claiming responsibility was never a strong point with al-Qaeda, Jemaah Islamiyah (JI) and the assortment of Islamic salafists who have deployed a range of terrorist tactics in pursuit of their political and religious agendas over the past two decades.

Osama bin Laden took three years before claiming direct responsibility for the September 11, 2001, attacks on the United States.

Read more from Luke Hunt in The Diplomat.