Former Vice President Al Gore, left, and his wife Tipper are greeted outside the east coast premier of 'An Inconvenient Truth' by Senator Tom Harkin, D-Iowa, at the National Geographic Society Headquarters, Wednesday, May 16, 2006 in Washington. The film follows the former Vice President's efforts to discuss global warming and educate citizens and politicians alike on what he calls our 'planetary emergency'. When asked if the film was a prelude to a run for the Presidency in 2008, Mr. Gore indicated that at this time he has no aspirations to return to political life. (AP Photo/Chris Greenberg)
http://news.yahoo.com/news?tmpl=story&u=/060518/480/73eb815d830345b698e4d4e47f885a21Former Vice President Al Gore and his wife Tipper pause to speak with reporters prior to the east coast premier of 'An Inconvenient Truth' at the National Geographic Society Headquarters, Wednesday May 16, 2006 in Washington. The film follows Gore's efforts to discuss global warming and educate citizens and politicians alike on what he calls our 'planetary emergency'. When asked if the film was a prelude to a run for the Presidency in 2008, Gore indicated that at this time he had no aspirations to return to political office. (AP Photo/Chris Greenberg)
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