Last year, the Hajj celebrations in the holy city of Mecca, Saudi Arabia were marred by tragedy . A stampede killed over 2 thousand pilgrims and the collapse of a crane killed dozens more — bringing the Saudi government’s ability to cope with the influx of pilgrims (who number about 3.7 million annually) into question. For Hajj 2016, Saudi Arabia made unprecedented changes to its infrastructure and security in the region. Likely motivated by the fallout of the stampede and crane disasters last year as well as recent bombing attacks ...