Before the rise of ISIS in Iraq and Syria, al-Qaeda was the most-feared jihadi group in the world. But like a nimble start-up, ISIS broke away from al-Qaeda and let the parent fight the big powers, while it used new tactics and social media to gain money, power and a big reputation.
The world's most notorious terrorist organization is in turmoil after the deaths of Osama Bin Laden and last week Fazul Abdullah Mohammed.
Al-Qaida's long-time second in command, Ayman al-Zawahiri has been named the new leader of Al-Qaida, according several jihadist websites. We talk to Christine Fair, professor at Georgetown's Center for Peace and Security Studies.