If that was a AT&T building…they were after one of the connection points from the NSA to the internet as discussed by Bill Brinney on NSA connection lines at AT&T buildings.

https://twitter.com/Bill_Binney/status/1313288608124678145

(20) cont'd from (19): If you go to the cities identified and look for AT&T buildings that have large cooling units on roofs plus have a railroad running close by, then these are the tap points collecting our data for NSA. I found almost all of them by using Google searches.

https://twitter.com/Bill_Binney/status/1313286931116167169