Front-Row Seat at the Reagan White House

Tickled Pink
The British Queen makes a joke at a 1983 state dinner. "I came without a tripod that evening," recalls Walker. "I remember borrowing a monopod, which I promptly broke. I could only get it halfway up, so I took this picture almost sideways and doubled over — and not from laughter."

• Diana Walker's "Public and Private: Twenty Years Photographing the Presidency"