WHENCE COMES TERROR: In the immediate wake of 9/11, it became a commonplace to say we now need to pay attention to dangers coming our way from far distant shores. After recent events in London, it's clear we need to see that the danger is disturbingly near. Peter Bergen and Paul Cruickshank discuss The Dangers of Tolerance. Key thought:

Britons now realize that Islamist terrorism can be homegrown. What's more, the attacks have focused attention on the extent to which Great Britain has become an exporter of Islamic terrorism in recent years, by providing refuge to Islamist radicals from throughout the Middle East. British-based radicals have taken advantage of the country's tradition of free expression to encourage young Muslims to join Osama bin Laden's jihad, providing the spiritual inspiration--and, in several cases, the manpower--for attacks and attempted attacks, not only in Europe and the United States, but back in the Middle East, as well.