I Could Make You Care

 is a quest in Fallout: New Vegas.

Quick walkthrough
This is the companion quest for Veronica. It involves her quest to save the Brotherhood from itself by finding a piece of technology that will convince them to change their line of thought.

Detailed walkthrough
After traveling with Veronica for a long enough period of time, she will tell you that she must return to the Hidden Valley bunker to tell the Brotherhood how to save itself.

Upon returning to the bunker, Veronica will speak to the Elder in charge of the bunker, claiming that the Brotherhood must change before it dies out. The Elder rebuffs her, and Veronica vows to bring a piece of technology that will make him change his mind. She goes and locates a terminal she and her mentor, Father Elijah, had used to store data. Veronica then gives the player a choice of technology to locate: either the Helios One Station, a pulse gun developed before the war, or a new farming technology.

If the player has activated Helios One without using the Archimedes II weapon system, you can tell Veronica that Helios One is not a weapon, reducing your choices to the pulse gun or the farming tech.

Should the player choose the pulse gun, Veronica and the player will go and look for it at Nellis Air Force Base, where the player must evade the Boomers' artillery barrage if they have not already done so. Once inside, the player will have to sort through a filing cabinet owned by the Boomer leader. Inside the filing cabinet is a note indicating that the pulse gun has been moved to Vault 34, which must then be searched. The gun is located in the highly irradiated vault armory, among a host of other loot. Once the gun has been obtained, Veronica and the player will return to the Hidden Valley bunker to meet once more with the Elder. He will still refuse to change, citing the codex. Veronica will ask the player what to do, at which point the player can suggest remaining with the Brotherhood, leaving the Brotherhood, or express apathy at Veronica's situation.

Should the player recommend staying with the Brotherhood, Veronica will agree and the quest will end.

If the player suggests leaving, Veronica will express a desire to join the Followers of the Apocalypse. The player and Veronica will then leave the bunker, where they will be accosted and warned by a group of Brotherhood Paladins. Once Veronica and the player travel to the Followers outpost, they will be informed that they cannot be allowed into the organization until the leader of the outpost returns the next day. After waiting a day, the player and Veronica can return to the outpost to find all of the Followers dead and a group of Brotherhood Paladins waiting in ambush. After a battle with the Paladins, Veronica expresses regret for the deaths she has caused and vows to travel only with the Courier for the remainder of the game.