One of the unspoken duties concerning our blanket coverage of the President when he is in public is the “death watch”, which is, quite simply, being there “in case” something terrible should happen.  It is the reason the Associated Press photographs each and every take off and landing of Air Force One or Marine One, just “in case” a terrible mishap should occur during take-off or landing,  or somewhere in between. We don’t carry our blanket coverage to that extreme, but we certainly are with the “body” whenever he is in public.