Some 6,000 men died in the battle for Tarawa, an 8-mile-square atoll that ended World War II as one of the bloodiest rocks in the Pacific. At noon, Col. Joseph H. Alexander, a veteran Marine amphibian assault officer, discusses his book about the battle, Utmost Savagery: The Three Days of Tarawa. Then, at 1 p.m. Alexander will introduce Death Tide at Tarawa, a new 47-minute documentary for which he served as a historical consultant. At the National Archives Theater, 7th & Pennsylvania Ave. NW. FREE. (202) 501-5000.