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.
Disiplin ilmiah, gaya jurnalistik
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The Islamic State has appointed yet another 'caliph' after the death of Abu Bakr al-Baghdadi. What is the idea behind the caliphate?
There have been several attacks on Shia mosques in several parts of the world. At its heart is the centuries'-old sectarian Shia-Sunni divide.
