Cold, Cold Heart

 is a quest in Fallout: New Vegas.

Quick walkthrough
Talk to Vulpes Inculta in Nipton then walk to Sgt. Kilborn at the Mojave Outpost to "spread the word".

Detailed walkthrough
As you walk through the flaming town of Nipton, Legion soldiers are crucifying the people in the center of the town. Near the town hall, 4 recuits and Vulpes Inculta are standing. Inculta will aproach you and tell you that he will let you live as long as you spread the word to the NCR of the horror they caused in Nipton.

Travel to the Mojave Outpost which is in the southern part of the map. Talk to Sgt. Kilborn (he is usually loafing around the entrance) and inform him of the Legion's atrocities. Quest complete!

NOTE: This does not have any apparent result in faction influence, straight XP reward. It also makes Vulpes and his 4 recruits vanish from Nipton