Preventive medicine entomologist Lt. Michael Kavanaugh, from Jenks, Okla., embarked aboard the multipurpose amphibious assault ship USS Iwo Jima, takes water samples as a Guatemalan boy watches. Iwo Jima is anchored off the coast of Guatemala conducting the Continuing Promise 2010 humanitarian 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 in eight nations.