On Monday, Barack Obama will be sworn in for his second term as President of the United States, his lease to the halls of the West Wing renewed for four more years. Following him into that White House labyrinth, once again, will be official White House photographer Pete Souza, the latest in a hallowed line of shutterbugs granted fly-on-the-wall access to the president and his family. From JFK Jr. toddling around the Oval Office to the Obamas stealing a private dance, here’s a look back at some of the most memorable behind-the-scenes photos.