Britain's Prime Minister Theresa May (center-R) and Saudi Arabia's Deputy Crown Prince, Second Deputy Prime Minister and Minister of Defense Muhammad bin Salman Al Saud (center-L) hold a bilateral meeting before the start of the G20 Summit in Hangzhou on September 4, 2016. G20 leaders meet, charged with reviving the sluggish world economy, but a growing anti-globalisation mood and alarm over China's territorial ambitions loom over the summit in the scenic city of Hangzhou. / AFP PHOTO / POOL / NARENDRA SHRESTHANARENDRA SHRESTHA/AFP/Getty Images