The White House says extraterrestrials have not invaded the human race . The U.S. government says there 's no evidence of life outside our planet . Thousands signed a petition asking for a national response on alien contact . Many Americans believe in an extraterrestrial invasion .
The White House says extraterrestrials have not contacted the human race . The U.S. government says there 's no evidence of life outside our planet . Thousands sign a petition asking for a government response on alien contact . Many Americans believe in an extraterrestrial presence .