The United States agreed on Tuesday to sell Saudi Arabia an arms package worth nearly $142 billion, according to a White House fact sheet that called it "the largest defense cooperation agreement" Washington has ever done.

A cavalcade of tech leaders was on hand in the Saudi capital for an investment summit presided over by President Trump and Saudi Crown Prince Mohammed bin Salman.

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,