You must have learned, I mean, you must have already known a lot about what you needed to know about concrete, but still, that whole experience, I mean, tell me what you learned.

Not enough, really.

Concreting in cold temperatures, I mean, not every country has that technology.

And also, technology that I was, I learned at the first undergrad school, for example, had improved quite a lot by the time I was doing my master's degree at University of Toronto, one of the best engineering schools in North America.

My professor was Professor Collins.

He passed away a couple of years ago.

One of the top North American engineers.

Of the what?