They got the required number of signatures on their White House petition to warrant an official response, but advocates of building a death star won't be happy. No dice, says the White House. Among the reasons: the $850 quadrillion price tag is a wee bit expensive and "the administration does not support blowing up planets." Besides, writes the OMB official charged with drafting the response, the International Space Station already provides a fine way to explore space. Read the full response here.