Petty Officer 3rd Class Laurie Kaczmarik, from Bristol Tenn. assigned to the engineering department aboard the aircraft carrier USS Harry S. Truman, participates in a shipboard reactionary force-basic course. Harry S. Truman is underway participating in Joint Task Force Exercise. The exercise is designed to test and evaluate the ship's ability to react to multiple wartime scenarios and is the final certification for a strike group preparing to deploy.