As you passed through a group of NEXUS Agents, you eventually ended up infront of a NEXUS Engineer guarding a door that had the Nexus Core logo. He stood still, wielding a holstered Spas-12. Even if you tried to enter, the door would be locked since it needed a keycard. The Engineer looks at you up and down before speaking.

"State your name and pass me your identification if you want to enter."