Christmas Tree lighting ceremony

The National Christmas tree is lit by US President Barack Obama on the Ellipse in Washington on December 9, 2010.WASHINGTON, DC - DECEMBER 09: As the White House is seen in the background, the National Christmas Tree is lit during its lighting ceremony December 9, 2010 at the Ellipse, south of the White House, in Washington, DC. The first family participated in the annual ceremony to kick off the