Millions of Muslims from all over the world are making their way to Saudi Arabia to perform the annual Hajj pilgrimage. This year, the Hajj pilgrimage comes as Saudi Arabia struggles to recover from the recent Hajj disaster, which claimed the lives of hundreds of pilgrims and injured over 850 others. Most recently, the Hajj pilgrimage was canceled in 2015 after the MERS outbreak that broke out in the Middle East. The Hajj pilgrimage has been canceled just a handful of times since its inception in the 7th century. An official from the Saudi Hajj Ministry said that the Hajj pilgrimage will be canceled twice every decade, but that doesn't seem to have been the case in recent history.