But, this part still confused me:
But even if the number doesn't grow, the danger is already enormous. The official number of British Muslims is 1.6 million, though most observers say it's closer to two million or so. The "official" guess at how many of these Muslims are jihadis is 16,000, based on the assumption that no more than 1 percent could be extremists.
That narrows it down.
Prepaid Calling Cards