Of course of that set, a large number would/could be assumed to call up and say “Hey we got a spare 777 that just landed” regardless of whether whoever was in charge of the craft let anyone on board say anything to anyone.
And any nation in charge of a runway that didn’t do that when it landed would “have some splainin to do”.
Wondering why nothing is said about what was in the cargo and how much fuel was loaded into flight 370 before takeoff. Might have been more fuel than usual. Has anyone heard of these reports — if any.