If the two teams playing the game are playing based on the clock visible to them and everyone in the stadium, why isn't that the OFFICIAL clock? Why have the OFFICIAL clock in someone's hand, pocket, booth or conference studio where those involved can't see it and is thus subject to manipulation? With today's technology, there is no reason the head official on the field can't control the OFFICIAL clock on the scoreboard, visible to everyone! Just asking why it's done the way it's being done which makes no sense!