In John, chapter 17, Jesus is praying for his disciples saying “…I told them many things while I was with them in this world so they would be filled with my joy. I have given them your word. And the world hates them because they do not belong to the world, just as I do not belong to the world. I’m not asking you to take them out of the world, but to keep them safe from the evil one. They do not belong to this world any more than I do.” In short…they were ALIENS to this world.
Area 51 is a reference to the US Air Force site in Nevada where aliens were rumored to be held after the “UFO crash” in Roswell in 1947. Just as these “aliens” were extraterrestrial, our teens become alien to this world when they receive the Word of God into their lives.