Al-Shabaab remains biggest threat in Somalia: UN envoy

Nicholas Haysom (Front), Special Representative of the UN Secretary-General for Somalia, attends a Security Council meeting on the situation in Somalia at the UN headquarters in New York, Jan. 3, 2018. The top UN envoy in Somalia Nicholas Haysom on Thursday warned that al-Shabaab remains the biggest source of insecurity in Somalia. (Xinhua/Li Muzi)