As they say, big, if true:

It’s still not clear what type of explosive or WMD he was found in possession of:

WMD could be any number of bad things:

Apparently, he didn’t have the weapon at the airport:

The FBI is investigating:

And the FAA confirmed he was an employee of the airport:

We’ll keep you posted.

Update. It was a “homemade pipe bomb”:

And it sounds like the friend was going to use the pipe bomb on a neighbor, but changed his mind. Then the air traffic controller ended up with it, according to the lates police report: