So far, unless i'm proved otherwise.
- The RV was parked right next to a large "DataCenter". (A building filled with servers, telephone equipment, and internet switches i.e.)
- RV gave warning to humans to get away, including gunshots.
- it appears the target was the building it was closest to (the one that took very little damage despite the RV being parked right in front of it) (big brown/red-ish windowless building)
While there are several mentions of the AT&T Building/Skyscraper, that is an office complex, the building that the RV was parked next to was the actual "Plumbing of the internet" building, you'll notice the building has little damage, as they are built to withstand blasts.
Data Centers are rated for "Physical Security" all the way up to its ability to withstand a bomb, typically rated SOC 1, SOC 2, SOC 3.. TIER 1, TIER 2, TIER 3.. ETC.
From what I've gathered thus far, the target of the blast was "somewhat successful". having knocked out the internet for regional users of AT&T.
Although i'm sure if that was the intention, the perpetrator may have been hoping for more visible damage to the datacenter.
And quite possibly was hoping to take down the entire internet (which is impossible without several strategically placed nukes all going off at the same time)
Time and investigation will tell, but all signs thus far are pointing to an american radical with the goal of "blowing up facebook" or something.