So I entered the NTSB warehouse. There were several mercs in there. While I was fighting the first group, one of the mercs randomly takes off running and enters a side room, sealing himself in behind a door that I can't open. I killed every other merc on the entire map and I can't find a key or any other way to open the door. And I can't get out of combat mode until he dies.
So basically I am perma-stuck unless I load a savegame, or unless I'm missing something. Any tips?