This is GPS, the Global Public Square.

Welcome to all of you in the United States and around the world.

I'm Farid Zakaria.

Today on the show we'll tackle the President's whirlwind trip.

Saudi Arabia, Israel, Rome, Taur Mina, and Brussels.

The highlights, the low lights, and the swirling scandals that awaited him back home.

I have a terrific panel.

Also, it's commencement season and once again, there is a diversity that is absent on college campuses.

The diversity of thought.

I'll tell you about the silencing of conservative voices.

And deep into the heart of Africa with one of its great modern-day Western chroniclers.

Pulitzer Prize winning Jeff Gettelman has put the continent on the front page of the New York Times.

Why does he say he loves this much misunderstood continent?

Then is science under attack under the Trump administration?

That's what many of the President's critics say, but super-scientists Brian Green just wants to make science cool again.

And he's doing just that.

But first here's my take.

This week's bombing in Manchester was another gruesome reminder that the threat from radical Islamic terrorism is ongoing.

And President Trump's journey to the Middle East illustrated yet again how the country's central to the spread of this terrorism, Saudi Arabia, has managed to evade and deflect any responsibility for it.

The facts are well known.

For five decades, Saudi Arabia has spread its narrow, puritanical and intolerant version of Islam, originally practiced almost nowhere else across the Muslim world.

Osama bin Laden was Saudi as were 15 of the 19 terrorists of 9-11.

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