Like past US first ladies visiting Saudi Arabia, Melania Trump's hair was not covered in the local custom, and she shook Salman's hand upon arriving in the kingdom.
"Terrorism has spread all across the world".
Donald Trump's first speech during his first trip overseas as president had all the ingredients for disaster.
"Drive them out! Drive them out of your places of worship".
The United States and Gulf Arab countries announced an agreement to coordinate efforts against the financing of terrorist groups.
During meetings this weekend, Trump will work to develop relationships with the leaders, with whom the United States hopes to partner to fight extremism.
Trump is the first US president to choose a Muslim-majority nation for his first stop overseas, and his aides have said the decision was meant to rebut notions that Trump is anti-Muslim.
Trump used his visit to Riyadh to bolster U.S. ties with Arab and Islamic nations, announce $US110 billion in U.S. arms sales to Saudi Arabia, sending Iran a tough message.
Introducing Trump, Saudi King Salman described their mutual foe Iran as the source of terrorism they must confront together.
Trump made nearly no mention of Israel, his next stop on the tour Monday, leaving it off a list of countries fighting terror. But on Sunday, standing before dozens of regional leaders, he said Islam was "one of the world's great faiths".
"The stories of Saudi women, such as yourselves, catalyzing change, inspire me to believe in the possibility of global women's empowerment", Ivanka said, adding that they "stand on the front lines of the fight for gender equality".
On the day before the summit, Trump signed a $110 billion arms deal with Saudi Arabia, which would commit the Sunni kingdom to buying various military equipment such as military vehicles, ships, tanks, helicopters, intelligence gathering aircraft, cybersecurity tools and missile defense radar systems. The groups the United States has been fighting in Afghanistan, Iraq and elsewhere since the September 11, 2001, attacks on Washington and NY are mostly Sunni Muslims, and enemies of Iran.
The first day saw the announcement of hundreds of billions of dollars in trade deals, welcome news for Trump as he faces mounting troubles at home.
There was no evidence of fiery-candidate Trump during Sunday's speech.
The meeting with Sisi - an avowed fan - was especially warm, and Trump said he would "absolutely" be putting Egypt on his list of countries to visit "very soon".
According to White House aides, there were as many as five different drafts of Trump's speech prepared by different teams of speechwriters, and that the president worked to reconcile those different ideas into his own address. Trump had promised to scrap it. But Trump's offhand remark was another stark reminder that his troubles at home, including the investigation of his campaign's ties to Russian Federation and his firing of FBI Director James Comey, have followed him across the ocean.