Secrets and Sins
The Helicarrier, an aircraft carrier specifically designed to be itself capable of independent powered flight in addition to the standard functions of aircraft carriers, is the world headquarters and signature capital ship of the extra-governmental intelligence/defense agency S.H.I.E.L.D..
Built by Stark Industries and designed by Tony Stark, Dr. Reed Richards, and former X-Man Forge. In addition to housing wings of fighters and other aircraft, the Helicarrier bristles with advanced weaponry, including an intercontinental ballistic missile.
The first Helicarrier was proposed by Stark Industries as a political compromise among the signatories of the treaty in response to fears that any nation hosting the Directorate’s main headquarters would be subject to attack by organizations such as Hydra with domestic political fallout sure to follow immediately thereafter.