On President Donald Trump’s first foreign trip, on which he will travel to Saudi Arabia, Israel, Italy, and Brussels, the “nuclear football” will follow him.

The so-called nuclear football is a black leather briefcase that contains top-secret items capable of allowing the US president to authorize a nuclear strike while away from fixed command centers, such as the Situation Room.

Officially referred to as the “president’s emergency satchel,” the unsophisticated-looking portable football is hand-carried by one of five military aides and is always within reach of the commander in chief, just in case.

According to Bill Gulley, a former director of the White House Military Office, the ubiquitous football does not contain a doomsday red-button keypad, but rather four items: