Secret Warriors #1

The Secret Warriors of Nick Fury have first appeared during teh Skrull Invasion. Not knowing who to trust, Nick Fury assembled "caterpillars" -- potential agents who have been flying below the radar and have not yet been corrupted by the "corrupt" world.

Credits
Story: Brian Michael Bendis and Jonathan Hickman
Artist: Stefano Caselli
Color Artist: Danielle Rudoni

The Secret Warriors are on a recon mission in a former SHIELD facility in Texas, codenamed Black Ice. Once Hydra agents were spotted, the more aggressive team members engaged them and, thus, were seen. Shortly after, a H.A.M.M.E.R. battalion led by the Sentry appeared who immediately ordered a lockdown of the facility to contain everyone in it. Armed with cloaking devices, the Secret Warriors escaped.

Upon returning to the base, Fury was not happy as they did not follow the mission: to gather information and to do it without being seen. Everyone was dismissed afterwards except Daisy, aka Quake.

They first visited Phobos, aka the son of Ares, aka the Greek God of Fear. He's been enjoying teh Call of Duty in XBox and revealed that he has been playing online -- also revealing that he has "fixed" the lack of any Internet connection.

Later, Nick Fury reveals to her the truth: S.H.I.E.L.D. is part of Hydra! The same Hydra that he has been battling for years. He has been working from the bad guys since the start!

Some flashbacks:

ONE MONTH AGO: Chicago, Illinois, The Carousel, a S.H.I.E.L.D datacore facility, codenamed The Carousel. Nick Fury infiltrates the base and there discovers the true extent of the the influence of Hydra. Upon getting a copy of the information, he destroyed the facility. Realizing that S.H.I.E.L.D. has been compromised, he started coming up with some plans.

TWO DAYS AGO: The Whitehouse. Nick Fury infiltrates the Oval Room, where he gave the President information regarding two of nine covert domestic S.H.I.E.L.D. facilities. One was Black Ice. The other is unrevealed yet.

His goal is to determine if Hydra controls the highest reaches of the current US government. If HAMMER showed up, he knows that the current administration is clean.

Hence, the recon mission is done specifically to determine if H.A.M.M.E.R. would indeed show up or not in the facility spceifically revealed by Nick Fury to the President.