The big red button

The trope predates the nuclear era entirely.

A Wireless, Long-range Big Red Button Powered by a Coin Cell Battery

Big Red Push Button - RobotShop

Big red button Royalty Free Vector Image - VectorStock

Big Red Button Show Starter

Red button nuclear hi-res stock photography and images - Alamy

Revenge of The Big Red Button::Appstore for Android

davesdistrictblog: Press the big red button

Big Red Button

Massive Arcade Button with LED - 100mm Red