Plot Hole: If the message was in plain english all along, that means the aliens were able to understand english. In this case why did they not heed the president's warning and violated his request? It doesn't make sense. If they were friendly, they could have waited in Earth's orbit until they received the permission to enter.
Control Voice: (Closing Narration) To those who would fail to heed their own words be warned: you never know who's listening!
Control Voice:(Opening Narration) Is man the center of the Universe made in the image of his God? Or is mankind merely the temporary occupant of an insignificant world about to be extinguished?