Russian submarine hull thickness intelligence

A briefly visible curtain flap during commissioning ceremony revealed double-hull construction; subsequently used in computer simulations of weapon-damage scenarios. Tom uses it as illustration of why hull-thickness measurement is classified.

An important news source — Hudson, Yours Whitney — like a year ago, or maybe it was awesome [auspicious?]. They had pictures of some Russian submarine, a post on the blog: here's the commissioning of the submarine, attached to this awesome [stage]. It had some bunting and like shark tank over it — it was like a video from Fox News from a submarine, unfurled a big curtain coming out of it. But like one flap of the curtain was hopping open, and you could see they have a double construction on Russian submarines, you could see both the hulls there. And so the brief from the camera was, this is what we perceive what kind of damage our weapons would do to their submarines based on the hull thickness and assumed devil [shell?] operation. Some kind of bubble formation and collapse against the hull from a computer simulation. So sometimes you think, "Well, why is such and such classified?" — it turns out you can figure out why.