Senator John F. Kennedy in Boston, 1957.

Credit: Courtesy of Douglas Jones, LOOK Magazine Photograph Collection, Library of Congress

Taken January 11, 1962: Vice President Lyndon B. Johnson, Speaker of the House John McCormack of Massachusetts. President Kennedy's second State of the Union is titled, "Strengthening the Economy."

Credit: Courtesy of John F. Kennedy Presidential Library & Museum

President Kennedy confers with Attorney General Kennedy, White House, outside of Oval Office.

Credit: Courtesy of the John F. Kennedy Library

Senator John F. Kennedy in Seattle on the first day of his presidential campaign, 1959.

Credit: Courtesy of John F. Kennedy Library

President John F. Kennedy claps while his children Caroline and John, Jr. dance in the Oval Office.

Credit: Courtesy of the John F. Kennedy Library

Taken November 27, 1962 at Caroline Kennedy's 5th Birthday in the White House nursery: (from left) Caroline, John Jr., President Kennedy, Mrs. Kennedy.

Credit: Courtesy of John F. Kennedy Presidential Library & Museum

Taken August 4, 1962, the Kennedys in Hyannis Port, (from left) John Jr., Jackie, Caroline and John.

Credit: Courtesy of John F. Kennedy Presidential Library & Museum

President Kennedy and his daughter Caroline on a yacht during a weekend in Hyannis Port.

Credit: Courtesy of the John F. Kennedy Library

Taken March 12-26, 1962, Mrs. Kennedy on a boat trip with her sister Princess Lee Radziwill.

Credit: Courtesy of John F. Kennedy Presidential Library & Museum