The pair

The pair was the obvious choice. You take your stein over near enough to overhear them if you strain your ears but hopefully you don't look too suspicious. You knew most German Citizens were a little weary around SS officers so you had come to the hall in more casual military fatigues. It seemed to be working as the other patrons weren't paying you much attention. Straining you are able to overhear part of the pair's conversation, you quickly realize that these are indeed scientists.

Scientist one: "I don't know Hans, I can see how the gas would be effective at deterring troops and it's better than killing them but it just seems wrong. Should we really be playing god like this?"

Hans: "Fritz, Fritz my friend. Then you do understand. I have seen what the killing gas does to a man. When you have seen that mess, that waste of life... We will be seen as merciful saviors. The history written by Hitler's sycophants will know that we saved millions of lives and ended the war for German glory. We are at war and that means we must deprive the enemy of fighting men."

Fritz : "I guess you're right, but it doesn't sit well with me. Anyways I'm going to head back in and get the tests running for tomorrow's batch."

Hans : "Good man, that's the spirit. I will see you tomorrow."

With that Fritz gets up and leaves. You wait a moment and drain the rest of your beer before.