On November 22, 1963, President John F. Kennedy was assassinated while in a presidential motorcade in Dallas. Pictured, Kennedy's widow, Jacqueline Kennedy, children, Caroline and John, and mother, Rose Kennedy, behind, wait outside St. Matthew's Cathedral for the procession to the cemetery during his funeral on November 25. Stan Wayman/Time & Life Pictures/Getty Images
On November 22, 1963, President John F. Kennedy was assassinated while in a presidential motorcade in Dallas. Pictured, Kennedy's widow, Jacqueline Kennedy, children, Caroline and John, and mother, Rose Kennedy, behind, wait outside St. Matthew's Cathedral for the procession to the cemetery during his funeral on November 25. Stan Wayman/Time & Life Pictures/Getty Images
Kennedy's flag-draped casket lies in state in Washington. Stan Wayman/Time & Life Pictures/Getty Images
John F. Kennedy's flag-draped casket lies in state in Washington. Stan Wayman/Time & Life Pictures/Getty Images
A horse-drawn caisson bears the body of President John F. Kennedy into Arlington National Cemetery. Stan Wayman/Time & Life Pictures/Getty Images
John F. Kennedy's widow, Jacqueline Kennedy, and brother Robert Kennedy attend his funeral at Arlington National Cemetery. See the complete gallery of photos at LIFE.com. Stan Wayman/Time & Life Pictures/Getty Images