As President Donald Trump tours the Middle East, the United States and Saudi Arabia signed a historic $142 billion arms deal that according to the White House was the largest defense sales agreement in history.

The U.S. President is embarking on a four-day trip to Saudi Arabia, Oman, and Qatar with a $1 trillion wish-list.

President Donald Trump opened his four-day Mideast trip on Tuesday arriving in Saudi Arabia, the first leg of his three-nation visit this week meant to tackle multiple crises and conflicts across the region.