First off he should have never carried this gun on International flights outside of US jurisdiction.
This is in the training.
Then in his layover if this was a mistake why go through security on that side.
He had to know it would be questioned.
Personally the FFDO program is good and easy to get, but the recurrent status to keep is not worth the time.
I have better things to do on my off days than play with government red tape.
One funny side to this,if you are a FFDO you can carry a gun, but any tools you carry over 7 inches long are forbidden, like a flat blade screwdriver or extension you may need to manual start.
TSA cant see the forest for the trees.
Ask any TSA they hate the ones that caused this just as much as we do,
Good for them they have many jobs, bad for all the rest of us.
Before 911 flying was fun paid well and was a good job.
The Whacko religious ones changed all of this for us.
There would never be a FFDO program if this had not happened.
When we point the fingers at each other lets all remember the root cause.