Something I found interesting. Sometime in the early 80s President Reagan fired around 13,000 air traffic controllers. Around 9-10k were hired at around that time. Then around 30 years later they all retired at around the same time. Keep in mind, you can't be an ATC past the age of 56 in the US. That created a shortage that remains to this day. More air traffic controllers were fired by Reagan than there are air traffic controllers working today. There is also probably more air traffic than there was back in the early 80s. Something to think about.