Petty Officer 2nd Class Mikel Lopez, from Riverside, Calif., replaces the seawater valve on a deballasting tank aboard the multi-purpose amphibious assault ship USS Iwo Jima. Iwo Jima is underway supporting Continuing Promise 2010, a humanitarian and civic assistance mission. The assigned medical and engineering staff embarked aboard Iwo Jima are working with partner nation teams to provide medical, dental, veterinary, and engineering assistance to eight different nations.