Perfectly clear, but what I understand from the video posted above is that during an approach and landing on the lawn of the White House, there is just one line marking that serves to line up on during the approach to the area, and the three circles where the gears need to end up (from 29:00 on in that documentary). That would leave you without any sight lines during the touchdown phase. The markings are visible in a shot from the flightdeck at 19:41 in the video.
Edit: I see that you were
curious about this too John...
