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Professor Helbing will give a keynote talk at the TGF15 in Delft on October 28th, 2015

AP News: Experts - In huge crowds like that of the hajj, lethal conditions can build up quickly

The Washington Post: A deadly stampede shows the danger of the hajj

Sohu: The stampede near Mecca as a fluid dynamics problem

Watson: Mekka probably won't be ever fully controllable

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