The Combating Terrorism Center at West Point published on 24 September 2013 a timely piece on the death in January 2012 of one of al-Shabaab's foreign fighters, Bilal Al-Berjawi.
The analysis titled "Bilal Al-Berjawi and the Shifting Fortunes of Foreign Fighters in Somalia" is by Raffaello Pantucci, a senior research fellow at the Royal United Services Institute.