U.S. Navy Cmdr. (Dr.) Tamara Worlton, right, and Dr. Vyramuthu Varanitharan, left, a Sri Lankan general surgeon, discuss robotic surgery techniques before performing the first robot-assisted surgery aboard the hospital ship USNS Mercy during Pacific Partnership 2018 in Trincomalee, Sri Lanka, May 4, 2018. Worlton is a surgeon assigned to the USNS Mercy. Navy photo by Petty Officer 2nd Class Kelsey L. Adams