They can’t be at all possible malls, so anything the FBI does is going to be quite a bit “AFTER THE FACT” of an attack. People will get killed anyway, if some Islamic Terrorists manage to attack a mall. The FBI will be coming in after it’s all over!
The FBI is undercover in every mall, in every major anchor store, they are disguised as perfume tester gals that spray every person within 50 feet a toxic dose of the most reprehensible odors imaginable. Have no fear, any terrorist will be stopped in a heart beat when some sweet innocent looking gal sprays them like a New York rat getting zapped by an exterminator.