The White House released a bunch of photos on its Flickr page today. This is one of my favorites, POTUS on 3/30/12 walking into the White House at night. Here are the details, from Pete Souza, the White House photographer:
"We had just arrived aboard the Marine One helicopter on the South Lawn and the President was walking into the White House. I had seen this scene several times but had never been able to quite capture it the way I wanted. Here, finally, arriving at night, I was able to frame him walking into the light of the Diplomatic Reception Room, with the added bonus of his shadow being cast from the television lights off to the left."
Photos via White House Flickr.