Power Armor Training (Fallout 3)

Power Armor Training is a Fallout 3 perk. It is necessary in order to operate or wear a suit of Power Armor and a Power Helmet. It can only be gained at the Brotherhood of Steel Citadel, access to which is granted at the beginning of the main quest Picking up the Trail.

After gaining permission from Elder Lyons, Paladin Gunny in the Citadel Courtyard can teach you how to use power armor (which literally just consists of him telling you to relax your muscles while wearing Power Armor). Brotherhood members will say that Gunny is in the bailey, but that is another term for the courtyard.

If you do not ask for training on your own, you will get it automatically at the end of The American Dream when you become an honorary member of Lyons' Pride.