MOGADISHU, Somalia ? A commander of the Somali-based extremist group, al-Shabab, says a new leader has been appointed following Monday's killing of Ahmed Abdi Godane in a U.S. airstrike. Abu Mohammed said Saturday that the militants unanimously decided that their new leader is Abu Ubeid Ahmed Omar. Godane and other al-Shabab officials were killed by a U.S. airstrike Monday hit the car in which he was traveling. The attack took place 105 miles (170 kilometers) south of Mogadishu, where al-Shabab trains its fighters. President Barack Obama confirmed Friday that Godane was killed by the U.S....