Hospitalman First Class Paul D. O'brien, a corpsman with the 11th Marine Expeditionary Unit, speaks with visitors at a medical display during the adoption ceremony at the city of Yorba Linda, May 16. The 11th MEU is a flexible, adaptable and persistent force capable of rapidly responding to crises and contingencies. (U.S. Marine Corps photo by Gunnery Sgt. Rome M. Lazarus/Released)