CTP’s Threat Update series is a weekly update and assessment of Iran and the al Qaeda network. CTP’s Iran team follows developments on the internal politics, nuclear negotiations, and regional conflicts closely. The al Qaeda network update includes detailed assessments of al Qaeda’s affiliates in Yemen, the Horn of Africa, and the Maghreb and Sahel. Below are the top three takeaways from the week: 1. Two rival governments appear to be emerging in Yemen – one based in Sana’a and controlled by the al Houthis and the other based in Aden under former President Abdu Rabbu Mansour Hadi. President Hadi, however, will likely have to contend with Southern Movement factions who reject his presence in southern Yemen. 2. The IRGC Great Prophet 9 military exercises reinforced the Supreme Leader’s December 1 call to enhance Iran’s military capabilities “irrespective” of the nuclear negotiations. The operational framework of the military drills, moreover, seemed to be aimed at deterring a potential attack, in the event that Tehran and the P5+1 fail to reach a final deal. 3. Violent clashes between Somali security forces and Ahlu Sunna wa al Jama’a (ASWJ) militias in central Somalia risk undermining the Somali government’s ability to combat al Shabaab, potentially allowing the al Qaeda affiliate to regain territory in the region.