180602-N-OU129-525 SINGAPORE (June 2, 2018) Secretary of Defense Jim Mattis meets with Republic of Korea Minister of National Defense Song Young-moo at the Shangri-La Dialogue 2018, June 2, 2018. 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)