Trump aims to drum up financial support for the US with his Middle East trip, but Iran and Gaza also hang in the balance.
In his first public words, Pope Leo told the crowds and a global audience 'peace be with all of you'.
The deal marks the first trade agreement by the US since President Donald Trump imposed a universal 10-percent tariff.
President Xi Jinping called for closer bilateral relations with Russia and reaffirmed China's support for the country.