The Helicarrier is the signature capital ship of the fictional intelligence/defense agencyS.H.I.E.L.D.
Originally designed by Jack Kirby for the Nick Fury, Agent of S.H.I.E.L.D. serial in Strange Tales #135 (August 1965), the Helicarrier concept has survived multiple redesigns while rarely straying from its originally depicted role as a mobile headquarters of S.H.I.E.L.D. until recent years.
The original design is attributed to a co-operative effort by Tony Stark, the mutant inventor Forge, and Reed Richards. According to one account in Amazing Fantasy vol. 2, #10, 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.
Over twenty Helicarriers have been built over the decades, and at least two have been in simultaneous service in the last decade on several occasions.
The only helicarrier to have been even remotely close to our soil in the last 10 years is a specially designed helicarrier code named Behemoth - it was commanded by Dum Dum Dugan for use against Godzilla... It was successful and we managed to stop Godzilla before too many innocents were injured. However, this Helicarrier was subsoquently destroyed following a hijacking by Armadeus Cho. We need to know how this happened in order to prevent any following attacks to Helicarriers. Inside the Observation Deck should be a small chip- similar to a black box it records all kinds of data including what virus was uploaded to override the system.
You need to get into the fallen observation deck and find the chip.