General Thomas had her answer. From the six of us that arrived yesterday, only one of us would be staying. I imagine she wasn't particularly pleased at losing out on six capable soldiers, but she didn't show those feelings at all. 
"Thank you. Spencer, Emma, Sam," She started nodding at each of us, "remember to make yourself at home while you are here, you are welcome to leave any time you wish. I just have to clarify before you all leave, that there will be exceptions to the rule if it's found that you've discovered any information that cannot leave this building. Even something you overheard. We absolutely cannot risk any leaks. Understand?" She flicked her gaze at Nina, as we all nodded our heads. 
The message was clear, Nina wasn't allowed to say a thing.
"Great, Nina will meet with you later." General Thomas dismissed the three of us, and with slow movements and regretful gazes, Em and Spencer stood up, following me out of the room.