A U.S. Navy MH-60R Seahawk helicopter attached to Helicopter Maritime Strike Squadron (HSM) 78 lands aboard the guided missile destroyer USS Pinckney (DDG 91) to conduct a crew swap before returning to search efforts in the Gulf of Thailand March 9, 2014. U.S. Navy ships and aircraft were dispatched to assist a multinational search for Malaysia Airlines Flight 370, which disappeared March 8, 2014, over the Gulf of Thailand with 239 people aboard.