Okay, see that guy with the white vest and white shirt and buzz cut in the photo?
That's Gene Kranz, NASA Flight Director. (And played by Ed Harris in the movie Apollo 13.) The guy in charge. He can override the president if he feels the order/request will endanger the crew or mission he is directing. This shot was taken during the flight of Apollo 13 in the Mission Control Center in Houston, TX.
Why does this matter?
You will see shortly.