Narrator in “And When the Sky Was Opened”

Once upon a time, there was a man named Harrington, a man named Forbes, a man named Gart. They used to exist, but don't any longer. Someone or something took them somewhere. At least they are no longer a part of the memory of man. And as to the X-20 supposed to be housed here in this hangar, this too does not exist. And if any of you have any questions concerning an aircraft and three men who flew her, speak softly of them, and only in the Twilight Zone.