The guards that patrol the ice wall.
Entirety of NASA. Entirety of NOAA. Meteorologists. Cartographers. Everyone who works on Google Earth. Every engineer who works on satellites, rockets, and planes. Physicists.
However, I do think 10% is probably too high an estimate. While these are a lot of people in a lot of areas, they represent pretty small demographics each.
What’s actually news worthy is that TSA managed to catch this. Their success rate is abysmal, so I’m sure this is a big confidence boost for them.