U.S. Navy surgical staff assigned to the hospital ship USNS Mercy and a Sri Lankan surgical team from Base Hospital Mutur prepare to use a Da Vinci XI Robot Surgical System to perform the first robot-assisted surgery aboard the hospital ship USNS Mercy during Pacific Partnership 2018 in Trincomalee, Sri Lanka, May 4, 2018. Pacific Partnership, in its 13th iteration, is the largest annual multinational humanitarian assistance and disaster relief preparedness mission conducted in the Indo-Pacific, increasing disaster response capabilities, stability and security in the region. Navy photo by Petty Officer 2nd Class Kelsey L. Adams