U.S. President Donald Trump, speaks as Mohammed bin Salman, the Kingdom of Saudi Arabia's deputy crown prince and minister of defense, left, sits in the Oval Office of the White House in Washington, D.C., U.S., on Tuesday, March 14, 2017. Trump's administration may resume selling weapon guidance systems to Saudi Arabia that was halted by former President Barack Obama in December, according to the Wall Street Journal. Photographer: Mark Wilson/Pool via Bloomberg