U.S. Marines Brig. Gen. John Jansen of the 3rd Marine Expeditionary Brigade and Maj. Gen. Andre Costales, Commandant of the Philippine Marines Corps, salute the flags at the opening ceremony for the 33rd joint US-Philippines amphibious landing exercises dubbed PHIBLEX at the marines corps in Taguig city east of Manila, Philippines Tuesday Oct.4,2016. President Rodrigo Duterte said he was giving notice to the United States, his country's long-standing ally, that joint exercises between Filipino and American troops this week will be the last such drills. He told the Filipino community in Hanoi, Vietnam's capital, last week that he will maintain the military alliance with the U.S. because of the countries' 1951 defense treaty. But he said this week's exercises will proceed only because he did not want to embarrass his defense secretary.(AP Photo/Bullit Marquez)