It started as trash talk between two contributors to a national security blog. They decided to host a drone smackdown to see if one guy’s machine could take down another. Unarmed drones, of course. The kind you can put together with a toy-store model and $200 in modifications. But the game turned out to have some serious undertones. First, a word about the location. For a moment last week, the whole drone smackdown was up in the air.