British Prime Minister Theresa May (R) shakes hands with Australian Prime Minister Malcolm Turnbull during a bilateral meeting on the sidelines of G20 Summit in Hangzhou on September 5, 2016. G20 leaders meet in China under pressure to reboot the world economy, after host leader Xi Jinping warned against "empty talk" and a rising mood of protectionism that threatens globalisation and free trade. / AFP PHOTO / POOL / ALY SONGALY SONG/AFP/Getty Images

DARLINGTON, SC - SEPTEMBER 04: Michael McDowell, driver of the #95 Thrivent Financial Chevrolet, races with Kurt Busch, driver of the #41 Haas VF1/Monster Energy Chevrolet, and Matt DiBenedetto, driver of the #83 Orange Crush Toyota, during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Brian Lawdermilk/Getty Images)

DARLINGTON, SC - SEPTEMBER 04: Michael McDowell, driver of the #95 Thrivent Financial Chevrolet, races during the NASCAR Sprint Cup Series Bojangles' Southern 500 at Darlington Raceway on September 4, 2016 in Darlington, South Carolina. (Photo by Brian Lawdermilk/Getty Images)

A worker attaches a connector to electrical wire on the factory floor of PP Control and Automation near Cannock, Britain, July 6, 2016. REUTERS/Phil Noble/File Photo GLOBAL BUSINESS WEEK AHEAD PACKAGE - SEARCH "BUSINESS WEEK AHEAD AUG 1" FOR ALL IMAGES - RTSKHR7

France's President Francois Hollande looks on during a meeting with Russia's President Vladimir Putin (not pictured) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

Russia's President Vladimir Putin poses during a meeting with France's President Francois Hollande (not pictured) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

France's President Francois Hollande (L) meets with Russia's President Vladimir Putin (R) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images

Russia's President Vladimir Putin looks on during a meeting with France's President Francois Hollande (not pictured) during the G20 Leaders Summit in Hangzhou, Zhejiang province, on September 4, 2016. G20 leaders confront a sluggish global economy and the winds of populism as they open annual talks, but the long war in Syria and the South China Sea territorial dispute hang over the summit. / AFP PHOTO / STEPHANE DE SAKUTINSTEPHANE DE SAKUTIN/AFP/Getty Images