After more than a decade and two wars in Iraq and Afghanistan later, much of what we thought we knew about fighting terrorism and insurgencies has turned on its head. The attacks in Paris confirm what we've already seen in places like Mumbai and Nairobi: that the battleground is shifting away from rural, more isolated areas (like the caves of Afghanistan) to more densely populated urban centers. The city is the battleground of choice for terrorists in the 21st cent [...]
