Thanks to Google Alerts, there's a bit of new info just in on the USF students-cum-traveling band of fireworks experimenters named Mohamed and Megahed. The pair were apprehended last month in South Carolina and the usual parties immediately blamed law enforcement's tendency to "profile".
I don't know about you, but whenever I'm getting ready to shoot off fireworks near a sensitive military installation, I cut PVC pipe into small sections, fill those up with a potassium nitrate-based compound, and drill holes in them. Plus, I carry around a large gas canister to make sure my fireworks will ignite when I need them to. Oh, and bullets too, in order to add the cool "pop-pop-pop" sounds.
So I totally buy into their story.
More recent updates here.