Anecdotal: to make a tower with holes, the protruding piece of concrete above holes has to use what's called cantilever. Whereby the adjacent piece of concrete holds up protruding pieces of concrete through the re-bar in the concrete.
Yes.
Remember the Rio Olympics? The fear was the Zika virus would be spread at the Olympics and end up as a worldwide epidemic.
Sit in a stadium for three days and you will almost always end up sick. The flu loves enclosed environments.
Yes. Messages come from servers. Messages on servers can be changed. Reading and decoding server messages can be scripted. Quick communication in plain sight.
What is the use of having a bunker if you've got more electrical communications lines going in and out to the point of being lit up like a christmas tree?
Recall who was recently in the WH. Do you think that PEOC is still secure?
The only secure bunker is an airgapped bunker.