"The 47-year-old has been seen for the first time in five years in a new video released by ISIS to prove that he is still alive. Some say he was already a militant when the US and its allies invaded Iraq. Baghdadi founded the Jamaat Jaysh Ahl al-Sunnah wa-l-Jamaah - Army of the People of the Sunna and Communal Solidarity), a militant Sunni group. He also became influenced by the Muslim Brotherhood, the Counter Extremism Project says."