It’s on: the new National Christmas Tree lights up (AP)

President Barack Obama, first lady Michelle Obama, daughters Malia and Sasha, obscured, and mother-in-law Marian Robinson, far left, arrive for the lighting of the National Christmas Tree at the Ellipse across from the White House in Washington, Thursday, Dec., 1, 2011. (AP Photo/Pablo Martinez Monsivais)AP – The new National Christmas Tree is getting its holiday on.