Give Spy Holodisk to authority in NCR

Detailed walkthrough
When the Chosen One is in Vault 15, go to where Darion was standing and scan the computer right behind him. With a high enough Science skill, he will get the NCR spy holodisk. Take the holodisk to NCR. If he tells president Tandi about them having a spy within her government, she will realize that Feargus (the person in the Hall of Congress entrance room) is the traitor and tells him to give the disk to her aide Gunther.

Once the Chosen One gives him the disk he will award the Chosen One with $4000. Afterwards Feargus will promptly leave the republic after having been disgraced or executed for high treason (the Chosen One can use the holodisk to transfer the data on it to your Pip-Boy 2000).

Отдать диск шпиона властям НКР