A reason to watch the inauguration

An intriguing comment on EU Referendum which might make me actually watch the inauguration:

The inauguration of a new President is always exciting and I have watched several in the past on TV, urged by my father to look out for the man with the briefcase that supposedly contained the code that could unleash a nuclear war. As the incoming Commander-in-Chief was sworn in, he maintained, the man quietly detaches himself from the old one and positions himself behind the new one. I never managed to notice the crucial moment and have no idea whether the instructions were accurate.