Philippine President Rodrigo Duterte attends the 115th Police Service Anniversary at the Philippine National Police (PNP) headquarters in Quezon city, metro Manila, Philippines August 17, 2016. REUTERS/Noel Celis/Pool

Philippine President Rodrigo Duterte attends the 115th Police Service Anniversary at the Philippine National Police (PNP) headquarters in Quezon city, metro Manila, Philippines August 17, 2016. REUTERS/Noel Celis/Pool

Philippine President Rodrigo Duterte attends the 115th Police Service Anniversary at the Philippine National Police (PNP) headquarters in Quezon city, metro Manila, Philippines August 17, 2016. REUTERS/Noel Celis/Pool

August 20, 2016 9:35 AM (UTC+8)