strange things will happen to the sun, moon, and stars.  the nations on earth will be afraid of the roaring sea and tides, and they won't know what to do.  people will be so frightened that they will faint because of what is happening to the world.  every power in the sky will be shaken.  then the son of man will be seen, coming in a cloud with power and great glory.  when all of this starts happening, stand up straight and be brave.  you will soon be set free.
United States