US Navy (USN) Sailors aboard the Aircraft Carrier USS JOHN F. KENNEDY (CV 67) participated in a safety, health and wellness stand-down sponsored by the Safety Department. The three-hour event focuses on fitness promotions, general health and various aspects of personal and environmental safety. The KENNEDY is currently in port at Naval Station Mayport, Florida (FL). (The photograph is intended time lapsed photography)

Aircraft carriers are warships that act as airbases for carrier-based aircraft. In the United States Navy, these consist of ships commissioned with hull classification symbols CV (aircraft carrier), CVA (attack aircraft carrier), CVB (large aircraft carrier), CVL (light aircraft carrier), CVN (aircraft carrier (nuclear propulsion) and CVAN (attack aircraft carrier (nuclear propulsion). The first aircraft carrier commissioned into the United States Navy was USS Langley (CV-1) on 20 March 1922.