As the Time magazine White House photographer for twenty years, Diana Walker captured virtually every move of Presidents Reagan, Bush and Clinton. After starting out shooting amateur black-and-white photographs of the 1963 civil rights march at the Lincoln Memorial and President John F. Kennedy's funeral, Walker had obtained White House and Congress credentials by 1975 through freelancing for Washington Monthly. In 1979, she became a contract photographer for Time, covering First Lady Rosalyn Carter's travels and Walter Mondale's presidential campaign.
Walker’s longevity as a White House photographer earned her exclusives—like being the only photographer in the room when Nancy Reagan entertained Raisa Gorbachev for the first time. She also was the first photojournalist allowed to spend an entire day inside the White House with President George H. W. Bush—resulting in the 1989 Time photo essay, "A Day in the Life of George Bush." Walker has also had her photographs published in Paris Match, Vanity Fair, People, Life and New York magazines.
Walker has won several awards for her work from World Press Photo, the White House News Photographers Association and the National Press Photographers Association. In 2003, she received the National Portrait Gallery’s Paul Peck Award for her interpretation and portrayal of the Presidency. In 2012, she was awarded the Henry Luce Life Achievement Award from Time, Inc. Walker's work is featured in the Smithsonian National Portrait Gallery and the National Museum of American History.