Some analysts are suggesting Philadelphia, the historic city of "Brotherly Love," is where the nation's next terrorism attack will happen.
Middle East Forum terror analyst Hillel Zaremba said one reason is that the city's mosques – one website lists 24 in the metropolitan area – are tied to a larger network.
"Many of them have ties to Islamist organizations. They have had, I use had, because they've gotten smarter and have scrubbed a lot of their websites of the references," Zaremba said. "But there are very troubling indications of the kinds of things they believe in and the causes they support – that would lead one to believe that they are from a hardline, Islamic worldview."