4X-ISR would be a likely candidate, but that hasn't moved yet for 16days, according to the trackers. Also no other 4X-reg (apart from the regular ELAL 4X-EHD) inbound at the moment. As the opening (and street closures) is between 1130-1530), one might assume it is enroute now. So likely its off trackers.
![Fade in :fadein:](./images/smilies/new_spiral.gif)
Another viable option would be he's arriving on one of the low key military Gulfstreams. Those often also do not track on such occasions.