USS RONALD REAGAN, At sea (June 19, 2006) â Over the flight deck of USS Ronald Reagan (CVN 76) an HH-60H Seahawk assigned to the âBlack Knightsâ of Helicopter Anti-Submarine Squadron Four (HS-4) prepares to offload supplies during a vertical replenishment (VERTREP). The Ronald Reagan Carrier Strike Group is currently participating in Valiant Shield 2006, a major military exercise off the coast of Guam involving 28 naval vessels including three carrier strike groups. Approximately 290 aircraft and more than 20,000 service members from the Navy, Army, Air Force, Marine Corps and U.S. Coast Guard are taking part in the exercise. Official U.S. Navy photo by Photographerâs Mate 2nd Class (AW/SW) Aaron Burden.