On This Day. 1923: The coffin of Warren Harding left the White House for the Capitol, where the president would lie in state. Harding died suddenly in San Francisco six days earlier - making Calvin Coolidge president 
On This Day. 1945: Days after the United States dropped an atomic bomb on the Japanese city of Hiroshima, a second attack was prepared; the target this time: Nagasaki
On This Day. 1974: Richard Nixon, planning to resign with hours, told VP Gerald Ford the news. Nixon said he would never call him "Jerry" again - only "Mr. President"
Richard Nixon's final lunch as President: pineapple with cottage cheese and a glass of milk - On This Day in 1974
On This Day. 1974
