General Motors Chairman and Chief Executive Rick Wagoner addresses the media during a news conference at GM world headquarters in Detroit, Michigan December 19, 2008. President George W. Bush on Friday offered a $17.4 billion government lifeline to ailing automakers General Motors and Chrysler LLC to prevent a deeper economic recession but he demanded they prove by March 31 that they can survive. GM, due for $13.4 billion, said the bailout will lead to a leaner and stronger company. Ford, which says its liquidity is adequate for now, said it hoped to continue restructuring without need for a government line of credit. REUTERS/Rebecca Cook (UNITED STATES)