This lunch was the last meal that President Nixon ate before announcing later that day—August 8, 1974—that he would resign following damaging revelations in the Watergate scandal.
White House photographer Oliver Atkins made a point of documenting the preparation of the lunch. 
You can learn more about President Nixon and his domestic policies in this Prologue magazine article: http://go.usa.gov/jUKG Image from the Richard Nixon Presidential Library and Museum

This lunch was the last meal that President Nixon ate before announcing later that day—August 8, 1974—that he would resign following damaging revelations in the Watergate scandal.

White House photographer Oliver Atkins made a point of documenting the preparation of the lunch. 

You can learn more about President Nixon and his domestic policies in this Prologue magazine article: http://go.usa.gov/jUKG

Image from the Richard Nixon Presidential Library and Museum