Petty Officer 3rd Class Carlos Aldana does push-ups. U.S. Navy Shipboard Reaction Force trainee Petty Officer 3rd Class Carlos Aldana does push-ups in the USS Kitty Hawk's (CV 63) hangar bay during exercise Valiant Shield 2007 while at sea on Aug. 8, 2007. The joint exercise consists of 28 naval vessels, more than 300 aircraft, and approximately 20,000 service members from the Navy, Army, Air Force, Marine Corps and Coast Guard. SHARE: Download: Full Size (0.02 MB) Credit: VIRIN: 512355-Q-FXN47-632.jpg Photo Gallery