Three millions of Muslims from all around the world are making the annual pilgrimage to Islam's holy city of Mecca. It's an Ancient ritual, religious ritual. But this year, swine flu fears have officials taking modern-day precautions. NBC's Tom Aspell has details.
It's the largest single gathering on the planet, more than two million Muslims from 160 countries at their annual pilgrimage to the holy sites of Mecca, an ideal breeding ground for swine flu. Saudi Arabian officials fear the virus might spread here and then be carried across the world when the pilgrims go home.
We are doing very heavy surveillance at this point, looking for the H1N1 virus, and also checking if there is any change in the virus strain.
Saudi Arabia's front line of d
