Philippine President Rodrigo Duterte (C) salutes as he reviews the honour guard as he attends the 250th Presidential Airlift Wing Command anniversary celebrations at Villamor air base in Manila on September 13, 2016.
The Philippines assured the United States September 13 it will honour its obligations as a military ally following volleys of profane tirades by unpredictable President Rodrigo Duterte. / AFP / TED ALJIBE (Photo credit should read TED ALJIBE/AFP/Getty Images)
Chinese President Xi Jinping stands by national flags at the Schloss Bellevue presidential residency in Berlin on March 28, 2014. Chinese President Xi Jinping begins a landmark visit to fellow export powerhouse Germany Friday, the third leg of his European tour, expected to cement flourishing trade ties and focus on the Crimea crisis.
AFP PHOTO / JOHANNES EISELE (Photo credit should read JOHANNES EISELE/AFP/Getty Images)