Here's a couple more - Harry (and the Hendersons) is Bigfoot, who's been around since the mid-60's. Lost in Space had a robot sidekick in 1965. The novel, 'Cyborg' was published in 1972 and was the basis for The Six Million Dollar Man (1973) which predates Luke's cybernetic hand by seven years.

To be fair, if you asked filmmakers who were kids when Star Wars came out (i.e. J.J. Abrams), of course they'll say it was influential, but some of the choices on the poster seem to suggest that Star Wars was completely original and unlike anything that came before it. Even George Lucas has said otherwise.

Exactly, so why give all the credit to Star Wars? That's not to say Star Wars didn't have an impact, but to imply those story elements are the main influence of everything that came after them is just plain wrong. Some of them even pre-date Star Wars.

That's the point - make the code hard to get to so he's less likely to use it. It's just a thought exercise. There's so many things wrong with this 'solution' it would never work in practice. Most notably, no one would volunteer. Not because the President may kill them, but because they'd have to be at President's side 24/7. What if the volunteer is sick or injured and has to be hospitalized? No one can cover for him. The guy with the briefcase doesn't have that problem, he clocks out and the next guy carries the bag. It's an 'all your eggs in one basket' scenario.

So you did. My bad. Twitter has ruined my attention span.