Anon asked a couple breads back for the pics of the manholes at the bomb site.
Pics related.
found it here >>12174242 pb
I'm op of the chopper view, clipped from the live news broadcast.
When I saw the chopper view I posted the theory that the RV was cover to park over a manhole and go through the RV floor to a manhole and plant the bomb under ground level inside the building.
The manhole pic posted later confirms the possibility.
Also there's a twit post that claimed the RV had been parked there for 36 hours. It was posted in the heel of a bread before the manholes pic but couldn't find that one. IRL stuff today.