The Islamic State is calling for attacks in the United States and Europe during the Muslim holy month of Ramadan.
During Ramadan last year, a radical Muslim killed 49 people at the Pulse nightclub in Orlando. But the frequency of attacks in the U.S. remains far fewer than in Europe.
“Following 9/11 we had a dramatic overhaul in the way that terrorist lookouts were put out on the system, the way we were issuing visas and the way we were sharing intelligence across the government,” says Scott Stewart, vice president of tactical analysis for Stratfor.com.
“We've seen them be able to send professional teams into Europe to conduct the Paris attacks, the Brussels attacks, but most of the attacks in the United States have been conducted by terrorists who just don't have the same level of sophisticated tradecraft,” he says.
Stewart says the U.S. has one more advantage over Europe.
“The Muslims here tend to be much more integrated, they tend to be much better socially and economically,” he says. “I think they believe by in large they have more freedom of opportunity here than some of the Muslims do in Europe.”
But Stewart warns if someone wants to kill, they'll find a way to kill -- noting an increase in the use of vehicles in recent years.