What are the consequences of the al-Qaeda leader’s killing?

Ayman al-Zawahiri helped Osama bin Laden plan the 9/11 attacks and was among America’s most wanted men - until the US tracked the al-Qaeda leader to a safe house in Kabul and took him out with a drone strike.

So what could be the repercussions of his death? And more than two decades on from the attacks on the Twin Towers where does the terror group sit now among the world’s biggest threats?

Global Security Editor Rohit Kachroo tells Lucrezia Millarini what you need to know…