This does not alarm me. We had a wanna be Major Hassan stoped in Texas before he completed his bomb. This punk planned to blow up a restaurant frequented by active duty military families. He was going to detonate his pre set charge, then enter and shoot any survivors.
The only reason he was caught was because he tried to buy gun powder at a gun store but demonstrated absolutely zero knowledge of handloading and the suspicious clerk notified local LEO's.
He was caught with bomb making materials and firearms and confessed to his plot.
If not for an attentive gun store clerk, this douche would have killed a lot of good people.