Al-Qaeda has now welcomed al-Shabab--the group responsible for the Kenya mall attack--into its ranks. Despite the targeted US killing of al-Qaeda leaders, more and more terrorist groups are joining the al-Qaeda network and expanding membership - what led former Australian intelligence analyst Leah Farrell to say, "al-Qaeda's bigger now than it ever has been." Both Osama bin Laden's death and the Arab Spring unrest allowed the al-Qaeda network to grow much stronger.