U.S. soldiers march during the opening ceremony of the "Balikatan 2018" in Quezon City, the Philippines, May 7, 2018. Troops from the Philippines and the United States kicked off on Monday a series of joint military exercises designed to hone their interoperability skills in fighting terrorism and humanitarian assistance. Philippine Defense Secretary Delfin Lorenzana said the 12-day "Balikatan 2018" will focus on interoperability training to address traditional and non-traditional security concerns. (Xinhua/Rouelle Umali)