ADEN, Yemen (AP) — Three people were killed on Wednesday when a car bomb exploded in an attack that appeared to target a leader of a Saudi-backed armed group in southern Yemen, according to witnesses and security officials. Witnesses Thabet al-Azab and Khaled al-Sebeihy described the incident north of Aden as targeting Hamdy Shoukry, a senior figure in the Giants Brigades, who survived. They said four people traveling in the motorcade transporting him through the area were injured. At least