President Donald Trump arrived in Riyadh on Tuesday to a royal-purple-carpet rollout and a motorcade ride ensconced by a calvary of Arabian horses – a daylong kickoff to the first major international trip of his second term.

RIYADH, Saudi Arabia (AP) — U.S. President Donald Trump opened his four-day Middle East trip on Tuesday by paying a visit to Saudi Arabia’s de facto ruler, Crown Prince Mohammed bin Salman, for talks on U.S. efforts to dismantle Iran’s nuclear program, end the war in Gaza, hold down oil prices and more.

President Donald Trump signed a $600 billion agreement with Saudi Arabia on Tuesday that includes a major defense contract and substantial investments in artificial intelligence—as U.S. business executives made their own set of deals at a conference in the backdrop of Trump’s visit to Riyadh, the first stop on his four-day tour of the Middle East.

Follow for live updates as Trump continues his Middle East trip in Saudi Arabia and Health and Human Services Secretary Robert F. Kennedy Jr. testifies on Capitol Hill.