Oil barely garnered a mention from U.S. President Donald Trump during his glitzy visit to Saudi Arabia this week. But the black gold may explain why the trip went so smoothly.

US President Donald Trump speaks with Saudi Crown Prince Mohammed Bin Salman on the day of the Saudi-U.S. Investment Forum, in Riyadh. Donald Trump also held talks with Syria’s interim leader Ahmed al-Sharaa, whose forces brought down the long-standing Assad dictatorship.

In a landmark announcement, President Donald Trump and the White House have confirmed a series of economic and investment agreements with Saudi Arabia, totaling $600 billion.

Trump met with Saudi Crown Prince Mohammed bin Salman and attended a US-Saudi investment forum along with Elon Musk and other top CEOs.

Attendees of the U.S.-Saudi Investment Forum included scores of the world's most powerful CEOs, among them Elon Musk, Jensen Huang and Larry Fink.

Saudi Arabia provided a mobile McDonald’s food truck for U.S. President Donald Trump’s visit. Rating: Mixture (About this rating?) What's True: A journalist spotted a McDonald's truck in Riyadh, Saudi Arabia,

Executives including Elon Musk and Nvidia’s Jensen Huang, were in Saudi Arabia for new investments. That, not tariffs, is what they wanted from Trump.

President Donald Trump praised Saudi Arabia's prince during a meeting on Tuesday, years after a U.S. intelligence report stated that the prince ordered a journalist's death.