170603-N-OU129-046 SINGAPORE (June 3, 2017) Secretary of Defense Jim Mattis delivers opening remarks during the first plenary session of the Shangri-La Dialogue 2017. The Shangri-La Dialogue, held annually by the independent think tank, the International Institute for Strategic Studies (IISS), is an inter-governmental security forum which is attended by defense ministers and delegates from more than 50 nations. (U.S. Navy photo by Mass Communication Specialist 2nd Class Joshua Fulton/Released)