An insanely large undertaking, 1962's "The Longest Day" is regarded as THE D-Day movie. Made close enough to June 6, 1944, to feature multiple cast members and consultants with connections to the War, tonight's movie strives for authenticity and accuracy. The astonishingly large, international cast includes the likes of John Wayne and Robert Mitchum, not to mention Henry Fonda and Richard Burton. Witness some of the most ambitious battle scenes ever filmed, including aerial- and tracking-shots that hold up today.