Hello everyone and welcome to Ammanpur. Here's what's coming up. A devastating

attack on Saudi Arabia's oil fields leaves production hobbled and threats of retaliation.

I'll look at the evidence and the ramifications.

Then, the science of well-being is relatively simple.

What does it take to be happy? Dr Lori Santos taught the most popular class in

Yale history and now she's teaching us the psychology of happiness.

And... Hello I'm Johnny Kay.

Ken Burns goes country.

The documentary filmmaker tunes into the heart and soul of America. Welcome to the program everyone. I'm Christina Wancour in London.

World oil prices are soaring after an audacious attack on two critical Saudi oil fields.

It knocked out half of that country's production capacity,

which represents 5% of the daily global supply.

And while Yemen's Iran-backed Hooti rebels claim they are behind the attacks, the

United States is pointing at Iran itself. Meanwhile Saudi Arabia says it is

still trying to figure out the exact origin but that so far quote all practical

evidence shows that Iranian weapons were used. President Donald Trump says America

is quote locked and loaded and ready to respond.

Iranian officials warn that the Islamic Republic is ready for full-fledged war and they say

is absolutely no chance of a meeting between Trump and the Iranian President Hassan Rouhani at the

UN General Assembly next week. So the Sabres are rattling and the tensions are

mounting in the Persian Gulf. Are they threatening to explode.

Joining me now to assess what to make of all of this, John Kirby, who was Pentagon spokesman

...