I wish I had sauce, just a message from a friend, so I won't even claim it's totally reliable.
However, maybe this will provide some ideas on things to look for?
Destroying evidence inside AT&T. Intended to blow entire building. Floor 7-8 were always off limits. They’re taking out the servers. It one massive server farm. Seen it with my own eyes. Are Chinese bribes and foreign kickbacks involving Bill Lee and Corrupt Cooper on those servers? There are tunnels under 2nd avenue.
The ATT building is on the corner of 3rd Ave N. and Commerce Street. The van that exploded was located on 2nd Ave N. with a row of large buildings in between the two. If any damage was done to the ATT building, it couldn't have come from the van, as only the front fascia of the buildings in between were damaged.