U.S. Navy Seamen Douglas McLain, left, and Cynthia Cea secure a hoist sling to an MH-60S Seahawk helicopter on the flight deck of the Military Sealift Command hospital ship USNS Comfort during flight operations to support Continuing Promise 2015 in the Caribbean Sea, May 17, 2015. The operation conducts humanitarian-civil assistance, subject matter expert exchanges, and medical, dental, veterinary and engineering support to partner nations.