http://www.nytimes.com/2016/01/04/world/middleeast/q-and-a-how-do-sunni-and-shia-islam-differ.html?hp&action=click&pgtype=Homepage&clickSource=story-heading&module=first-column-region®ion=top-news&WT.nav=top-news
http://www.bbc.com/news/world-middle-east-16047709
http://www.bbc.com/news/world-middle-east-16047709