Keeping Tabs on Dear Leader’s Nukes

In devouring the weekend’s reports regarding North Korea’s latest atomic machinations, we were struck by the technological limits of the global monitoring system. Seismic readings indicate that something went down that Mother Nature didn’t intend, but such tremors can be caused by conventional explosions. (Yeah, that’s a lot of TNT, but it can be done.) We’ll need to get a whiff of radioactive gas before we know the true extent of Dear Leader’s naughtiness.

So how do we check for those traces? Th