15 years after US killed Bin Laden, al-Qaeda faces steep competition with ISIS

Saturday will mark 15 years to the day that Osama Bin Laden was killed inside a compound in Pakistan during a targeted nighttime raid by US Navy SEALs. It was the culmination of a decade-long manhunt following the Sept. 11, 2001, attacks. Over a decade later al-Qaeda, the group Bin Laden founded, persists with affiliates and partners across the globe - but also faces steep competition from ISIS. The World's Host Marco Werman spoke to Aaron Zelin, a fellow at the Washington Institute for Near East Policy.