NSA Hidden Spy Hubs are located in windowless buildings in cities across the US including Nashville
https://theintercept.com/2018/06/25/att-internet-nsa-spy-hubs/
If the explosion is at the AT&T building it could be important. The buildings like this with the windows covered in shitty parts of town are fiber hubs. Most fibers for major fiber companies - Verizon has different hubs - all the fiber go in and house the switch gear for the companies. They are central offices for the fiber providers.
AT&T
That is corporate