The White House response was an insult to those of us who signed the petition. They did not even bother to do an investigation before sending out the response that there were no known extraterrestrials. All they had to do was to talk to some CIA or Pentagon people. It is the US military/intelligence community that has kept this secret for so long. They think the disclosure will jeopardize US dominance of the world. See ufocoverup.org for more info