[wildfire]

They run more than 2 already. Look carefully at the botocore source (for example).

This highlights they cater to every US classification level:

https://aws.amazon.com/government-education/government/

This announces their secret region, and references their top-secret one.

https://aws.amazon.com/blogs/publicsector/announcing-the-new...

Note: you might have to dig to find the non-US government classified clouds. They are documented in plain sight though.

Left as an exercise for the reader.

[ edited to add links ]