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.

U.S. President Donald Trump spoke during a U.S.-Saudi Investment Forum Tuesday after having touched down in Saudi Arabia aboard Air Force One on the first stop of four-day visit to the region.

Mr. Trump has few meetings directly about pressing geopolitical challenges. Instead, he’s in the Persian Gulf to make deals.