From Halopedia, the Halo wiki
A UNSC Archive is accessed. It tells the story of how colonial BXR Mining Corporation miners extracted an ore critical for Master Chief's exoskeleton.
SYSTEM COMPONENT [REACTIVE EXOSKELETON] SPARTAN OPERATIONS MJÖLNIR POWERED ASSAULT ARMOR GEN 3 MARK VI
Following the focus on the armor text appeared giving a quick overview of what happened before the archive started.
[GATHERING DATA...] ENTRY DATE: 2552.03.09 AFTER THE COVENANT BOMBARDED A UNSC EXCAVATION SITE. COLONIAL MINERS VOLUNTEERED TO EXTRACT AN ORE NEEDED TO FORTIFY THE MASTER CHIEF'S EXOSKELETON. ONLY THE ORE REACHED THE SURFACE BEFORE THE ONGOING ATTACK THREATENED TOTAL COLLAPSE. INITIATING VIDEO LOG...
The camera shows glimpses of Miners running away from collapsing rocks. An alarm is going off with the miners yelling and falling. Things start to calm down with the remaining miners standing in a cavern with the helmet lights the miners are wearing lighting it up.
A miner proceeds to remove his helmet, and walks to the center of the cavern, where he proceeds to sing.
The camera looks at the other miners, who are watching the miner singing.
The cavern echos distant booms from the bombardment outside, while debris fall and the miners watch. The singing miner has a tear go down the right side of his face while he sings.
A female miner passes a rock to another minor who proceeds to write something on the wall of the cavern.
The rest of the miners start to join in on the singing.
The singing becomes more intense, each time the rock hits the wall.
The miners look up as the cave finally collapses showing light from outside. Leaving only the message that was written.
FROM THE SOIL TO THE STARS