NEW: The White House has launched an Aliens website confirming the existence of 'aliens' walking among us in the United States."THEY WALK AMONG US.""For 60 years, the U.S. government has kept a closely guarded secret.""Aliens have been walking among us, living in our neighborhoods, and interacting with us..."The aliens, the website reveals, are not from a distant planet but are illegal aliens.The website displays a live map of every illegal alien arrest.