The President of the United States of America, authorized by Act of Congress July 9, 1918, takes pleasure in presenting a Second Bronze Oak Leaf Cluster in lieu of a Third Award of the Silver Star to First Lieutenant Robert B. Carlsen, United States Air Force, for gallantry in connection with military operations against an opposing armed force as an A-1 Tactical Pilot of the 1st Special Operations Squadron, in action against the enemy in Southeast Asia from 26 April 1972 to 27 April 1972. During this period, Lieutenant Carlsen volunteered to escort rescue helicopters to an extremely hostile, heavily populated industrial center of North Vietnam in an attempt to recover an American aircrew member downed by ground fire. Despite particularly adverse weather conditions which forced him to fly within range of active, sophisticated air defense positions and heavy concentrations of antiaircraft artillery, Lieutenant Carlsen, with complete disregard for personal safety, deliberately and repeatedly exposed his slow-moving aircraft to aid immeasurably in directing and protecting the vulnerable rescue helicopters during the successful recovery. By his gallantry and devotion to duty, Lieutenant Carlsen has reflected great credit upon himself and the United States Air Force.