On our 40th day in Immersion the phone rang just after noon. We were being summoned to High Command in Berlin for a conference. We were suddenly reminded why we had spent the last five and a half weeks in this trailer. Who we really were. That we had a mission to complete. We had history to change. And then back to our real lives in the distant future. The plane they sent arrived on schedule—a Junkers JU52. We spent the next five hours getting jostled around its interior. When we landed, we walked out the door to the sound of the Deutschlandlied, the German National Anthem. I returned the salute of the crew. It all felt unreal. Things like this didn’t exist.