Mohammed bin Salman, Saudi Arabia's crown prince, left, smiles as U.S. President Donald Trump, holds a chart displaying military hardware sales during a meeting in the Oval Office of the White House in Washington, D.C., U.S., on Tuesday, March 20, 2018. The U.S. and Saudi Arabia are developing an increasingly close partnership, encompassing everything from isolating Iran to bolstering business ties beyond energy into technology, defense and entertainment. Photographer: Kevin Dietsch/Pool via Bloomberg
