Found: Super Soldier Serum in all Avengers +Coulson -Thor

[hummingbird5589.livejournal.com]

Looking for a fic where it is discover that Tony, Phil, Clint, and Clint's brother Barney are the only survivors of an experiment where unscrupulous scientist test the super soldier serum on children. I think Tony was 10, Phil was 12, Clint was 5 and Barney was 7. Howard Stark did not know of the experiments and put a stop to them when he found out. Natasha has the red room serum and Bruce has the Hulk serum. I think it was on ArchiveofOurOwn.

Found in comments.

Comments

[selina-katinka.livejournal.com]

Only Different in the Details by LadyShadowphyre: http://archiveofourown.org/works/567367