U.S. Army Pfc. Angela M. McCormick vaccinates a cow on a farm outside Bluefields, Nicaragua, Sept. 21, 2010. Troops and civilians are participating in Operation Continuing Promise to provide medical, dental, veterinary, engineering assistance and subject-matter exchanges to the Caribbean, Central and South America. McCormick is a veterinary assistant. McCormick is embarked aboard the amphibious assault ship USS Iwo Jima.