[quote=@TheUnknowable]Once they got downstairs, Greg walked over to the Vault door and plugged his pipboy in.  A few seconds later, the door started to move and he unplugged it.  "Ok," he told the two Brotherhood members.  "We're in."  He started walking towards the now-opening door and a bullet ricocheted off of the vault door in front of him.  He knelt and looked at where the shot had come from, and saw a group of raiders running at them.  Assuming that they were there to snipe his salvage, he jumped over the rail and hid behind a crate, then started shooting back.  He hoped that the robots in the vault weren't active or they would be easily flanked.
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Sparks fell back behind cover, and began returning fire with her rifle, setting it to short bursts to suppress the enemy, allowing Paladin Zachary to advance and lead the attack. She took the advantage of any lulls in firing to see who the attackers were, and noticed that they seemed to be raiders and scavengers. It made things more difficult, since she had not been expecting someone else to find the Vault. Plus, if they had stolen anything of value, that might reduce the chance of recovering important technology.