You know, it looks to me like the President is wearing a full flight suit as he gets out of the plane at the Lincoln. These things are for safety, even though they look really cool, too. They're watertight, somewhat insulated (in the unlikely event of a water landing), protects against sudden loss of cabin pressure, and oh, restrict the blood flow to prevent pooling in the event of sudden G-forces. Given the pre-flight inspection this plane certainly got, these are all unlikely contingencies. But there's no point in being a fool. Can you imagine the catastrophe if an accident had occurred, and a flight suit would have saved the President's life? How dumb would that have been?