By Yousef Saba, Gram Slattery, Pesha Magid and Nafisa Eltahir RIYADH (Reuters) -President Donald Trump kicked off his trip to the Gulf on Tuesday with a surprise announcement that the United States will lift long-standing sanctions on Syria,

Day one of the trip saw the two sides announce a $142bn (£107bn) arms deal, as well as a raft of other investments that Saudi Arabia's crown prince said could eventually be worth $1tn. Trump also made Saudi Arabia the first foreign stop during his first term, in 2017. The rest of his gulf tour will include stops in Qatar and the UAE.

The U.S. has agreed to sell Saudi Arabia an arms package worth nearly $142 billion, the White House announced Tuesday, as President Donald Trump kicked off his Middle East trip in Riyadh. Described by the Trump administration as "the largest defense cooperation agreement" in history,