Today is Eid al-Adha, culmination of the pilgrimage to Mecca, now marred by yet another tragedy that has left hundreds dead in a stampede. (Earlier, it was a crane collapse.) In a new photo gallery, I offer some commentary on the stupendous transformation of Mecca in our time. If you haven’t followed it closely, and (like me) you don’t have any plans to visit Mecca anytime soon, the images (and the numbers) may astound you. The effect on Islam? Unpredictable. Follow this link.