Fort Independence

Fort Independence is the headquarters of the Brotherhood Outcasts in the Capital Wasteland, located west from the Fairfax Ruins. The Outcasts have adapted the Fort to their needs and restored much of its internal facilities. All of the technology they gather is stored within the fort, as are their research findings. By default the Outcasts inside are hostile to any trespassers. The Vault 101 Dweller can become accepted by the Outcasts if he donates enough technology (a truckload of Enclave power armours and plasma weapons should suffice).

The fort is guarded on the outside by Defender Morgan and Protector Casdin. The latter, after asking Morgan about a job, can hire the player to bring scavenged technology to them in exchange for supplies: 5.56mm ammunition, frag grenades, Rad-Away or Stimpaks. He also carries the key to the Fort, essential if access is to be gained.

Technology scavenging
You can trade any type of power armor (except Tesla Helmets, the T-51b Power Armor, the T-51b Power Helmet, Outcast Power Armor, and Outcast Power Helmets), any type of energy weapon, sensor modules, and scrap metal. In return he'll give you varying amounts of: Brotherhood Power Armor gives alot of stimpaks compared to a sensor module trade in. Casdin will stop offering to trade in the Power Armor after a few hand ins however.
 * 5.56mm ammo
 * Frag grenades
 * Rad Away
 * Stimpaks

If you speak with Protector Casdin while carrying or wearing Outcast Power Armor, then he takes it from you without recompense. It does not appear to be possible to prevent this. The one exception to this rule is the quest reward item Linden's Outcast Power Armor.

Its worth noting that you can get a stimpak for less scrap metal here than you can at the other trade in sites.

Appearances
appears only in Fallout 3.