Multi-billion dollar deals between the US and Saudi Arabia will be signed on Saturday as US President Donald Trump's first foreign trip begins in Riyadh.
President Trump and his wife Melania were greeted in the Saudi capital by King Salman today.
The eight-day trip will also take in Israel, the Palestinian territories, Brussels, the Vatican, and Sicily.
The visit comes as Trump faces uproar at home following his sacking of FBI director James Comey.
He has strongly criticised the decision to appoint a special counsel to oversee an inquiry into alleged Russian influence on the US election.
President Trump is accompanied on his visit by his daughter Ivanka, an unpaid White House adviser, and her husband Jared Kushner, a key member of the Trump cabinet.