Until we can change the perception that trade jobs are 'lower class' or unclean, we will continue to have vacancies.
I once remarked to a nephew who was thinking about what to do after high school that he should consider a trade. His parents overheard, and though they agreed it was good pay they didn't want their son doing that kind of work.
Upon reflection, I wouldn't want my son to do that kind of work as well, as it's usually hard work and not looked upon favorably.
I spent days almost 10 hours, completing a massive interview project for one company. I submitted a fully working solution, had unit test, was pixel perfect, and they didn't even give me an interview.
Not only that they gave me a vague reason, only after pressing for feedback.
Left a very bad taste in my mouth, don't think I'll be doing code assignments again, what a waste of time.
We have a similar practice in Chinese culture, after a woman gives birth, they must take baths with ginger for a few weeks. My mother in-law actually spent hours cutting up enough ginger for my wife.
If you have parents that are willing to go above and beyond for their child, a healthy child is sure to follow.
If so this could be a huge blow to security.
But I must say this is amazing that they were able to visualize prime numbers in this way. These guys are geniuses.