Photojournalist Doug Mills discusses his nearly 40 years photographing the last 7 presidents

Photographer Doug Mills has photographed the last seven presidents, including the current president, Joe Biden. During that time, dating back to Ronald Reagan's presidency in the 1980s, Mills has photographed many key moments during his four decades on the job. Mills currently works for The New York Times, where he's been since 2002. Before that, Mills served as chief photographer for The Associated Press in Washington for 15 years. He's also earned a pair of Pulitzer prizes for his photojournal...