How long? 40'? I'm not positive, but I think you can get a galvalum coated 10' diamter 40' culvert for right around $2k. A galvalum culvert is going to last at least 10 times longer than a painted steel shipping container.
Now consider 10' diamter gives you 78.5 cubic feet/foot of length, and a standard container give 76. So roughly the same volume/length. But the culvert is already prepared to be buried, and will last a lot longer.
I hope you forgot to use your purple there. Can we really trust the "tax-payers" with confidential information? The taxpayers pay for all of our DOD/National Defense stuff, does that mean we should share all the secrets with them so our enemies can get their hands on that info as well?
You can get 60' containers.
I'd rather have a D shaped bridge culvert.
If the government derives power from the people, can the government ever be more powerful than the people?
I have no problem with proprietary technology. As a matter of fact, we already have patent and copy right laws that cover that, and I fully support them.
Troop movement and identities of informants should be kept secret as well. However, we should know where are troops have been and what they've been doing. Future and current ops can and should be kept under lock and key.
I don't believe in making a class of people more important than another either. If the government knows about it, so should I.
After all, the people have the responsibility to elect Repersentatives and Senators, and how can they do that responsibly if they are not fully informed?
Without complete transparency you run the risk of converting from a Republic to an Autocracy.