Petty Officer 2nd Class Joe Jenkins, aviation electronics technician, checks for corrosion on the tail rotor of an MH-60S Sea Hawk helicopter aboard the amphibious transport dock ship USS Cleveland. Cleveland is the primary platform for Pacific Partnership 2011, a five-month humanitarian assistance initiative that completed its mission in Tonga and Vanuatu, and will visit Papua New Guinea, Timor Leste, and the Federated States of Micronesia.