How can I equip the various atomic armor in Fallout 3? I am already at level 22 but I still can't find anyone who can train me for equipping them. They are really good armors...
Do you mean the Power armors? (Maybe this is a regional version difference in nomenclature)
You can get power armor training by asking the brotherhood of steel about it after rescuing the scientists from project purity.
Alternatively, if Operation: Anchorage is installed, completing the sim will allow you to wear power armor.