Question: The Battle of Aden International Airport broke out when Army units loyal to former president Ali Abdullah Saleh attacked an airport in which country?
Sentence (from "Ali Abdullah Saleh"): Ali Abdullah Saleh (Arabic: علي عبد الله صالح‎ ‎ , "ʿAlī ʿAbdullāh Ṣāliḥ"; born 21 March 1942) is a Yemeni politician who rose to power following the assassination of President al-Ghashmi.
Relevant evidence: Yes