U.S. President Barack Obama landed in Riyadh on Wednesday to meet with Saudi King Salman and other Persian Gulf allies.
The visit comes against the backdrop of increasingly strained relations with the Saudis, who remain deeply opposed to his outreach to Iran and skeptical of his approach to Syria.
"The American people send their greetings and we are very grateful for your hospitality, not just for this meeting but for hosting the GCC-U.S. summit that's taking place tomorrow," Obama said, referring to the six-nation Gulf Cooperation Council summit that starts Thursday.
In addition to Saudi Arabia, the United Arab Emirates, Qatar, Kuwait, Oman and Bahrain are participating in the regional summit, which the White House said would focus on regional stability, counterterrorism including the fight against the Islamic State and al-Qaida, and Iran