Saudi Arabia is barring international visitors for the hajj. A scholar explains a long history of disease, politics and war that have previously prevented people from making the journey to Mecca.
An image of Islamic State leader Abu Bakr al-Baghdadi, who died on Oct. 26, 2019..
Department of Defense via AP
Senior Research Fellow, Muslim Philanthropy Initiative at IUPUI and Journalist-fellow, USC Dornsife Center for Religion and Civic Culture, University of Southern California