Talked to a buddy who is a retired F-16 driver. First, he's wondering why he didn't get a chance to do some fighter skeet shooting. Then, when the jokes died down, he expressed concerns about someone...and he mentioned the North Koerans, using balloons to fly an EMP weapon/device over here and cause havoc in a major metro area, if not a larger area given how the electric distribution network is so intertwined in CONUS.
Check your supplies, kids. And maybe watch that movie American Blackout that National Geographic put out in 2013.