Chris Spyrou

I mean, imagine walking into a bar and just seeing like a megastar performing in her jeans and tee.

That's like...

Very cool.

Weirdly enough, I did say if I had a time machine, I would love to go back to see I Know Problematic, Michael Jackson and

I'd love to see them in concert.

I mean, I'm so, yeah, I'm sad that they died before I could.

I know, I know.

Had I been hanging out at, you know, a jazz club at 2am, I might have been so lucky.

When Queen Elizabeth died, the world got a crash course in something called Operation London Bridge.

The intricate, decades-in-the-making plan for exactly that moment.

Who gets called, what gets said, and the precise order of events.

Over the weekend, the US got its own reminder that those kind of plans exist for a reason.

It's the third time in two years the Secret Service has had to spring into action to protect the U.S.

president.

And while investigations continue, the incident has forced a very real question back into the spotlight.

What exactly happens if one of these attempts succeeds?

So what does the line of succession actually look like in the Trump era?

And how do these secret protocols work when the clock starts ticking?

Garrett Graff is an award-winning US journalist and New York Times bestselling author.

Garrett, welcome to The Briefing.