With a 200-year-old building, you're bound to hear stories of strange happenings in the middle of the night, but when the building is the White House, the sightings often take on a more historical flavor. Many people believe the ghost of President Abraham Lincoln is still haunting the White House 150 years after his death. The New York Times' Peter Baker tells the story of Ronald Reagan's dog Rex who exhibited strange behavior in the Lincoln Bedroom. But was it really a ghost? "I think in some ways people might like the idea that Lincoln is still hanging around watching over us," Baker says.