I love this photo because of its historical significance:

The last time all living U.S. presidents met at the White House was Oct. 8, 1981, when then-President Ronald Reagan hosted his three immediate predecessors, Jimmy Carter, Gerald Ford and Richard Nixon, before they went to a state funeral in Cairo for assassinated Egyptian President Anwar Sadat.

The photo posted above was taken Wednesday in the Oval Office before the five men – from left, former President George H.W. Bush, President-elect Barack Obama, President George W. Bush and former presidents Bill Clinton and Jimmy Carter – met privately for a 90-minute luncheon at the White House. The photo reminded me of the cover of Bob Woodward’s book, Shadow: Five Presidents and the Legacy of Watergate, which features a photo of former presidents Bill Clinton, George H.W. Bush, Ronald Reagan, Jimmy Carter and Gerald Ford. I believe the Shadow photo was taken at Nixon’s funeral in 1994.