FILE - In this Thursday, Feb. 17, 2011 file photo, hundreds of newly trained al-Shabab fighters perform military exercises in the Lafofe area some 18 km south of Mogadishu, in Somalia. A Somali military official said Tuesday, Sept 1, 2015 that al-Shabab Islamic extremists have attacked an African Union (AU) base in the small farming town of Janale in southern Somalia. (AP Photo/Farah Abdi Warsameh, File)