SAN FRANCISCO - DECEMBER 15: A Sirius satellite radio is displayed at a Best Buy store December 15, 2005 in San Francisco, California. Sirius is hoping that the January 2006 debut of Howard Stern will boost its sales and subscriptions as it tries to compete with XM radio, which has a 70% market share in satellite radio and continues to sign up more customers. (Photo by Justin Sullivan/Getty Images)
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