President Bush and his wife, Laura, will wake up at 1600 Pennsylvania Avenue on Tuesday morning, just as they have the last eight years. But by the time the new president, Barack Obama, returns from the inaugural parade with his family in late afternoon, there will be nary a box of theirs left to unpack. Clothes will be neatly folded in drawers, pictures will rest on dresser tops and walls, stuffed animals will lie on beds, as if the Obamas had always lived there.

The highly orchestrated quick-change operation, conducted by the 93-member White House residence staff, has no parallel in the outside world. The entire affair is over and done with in a matter of hours, without a single moving man setting foot inside the Executive Mansion.