On December 7, 1941, the Japanese Navy launched a surprise military attack against the United States naval base at Pearl Harbor. Several U.S. Navy battleships sank or were damaged; smoke from burning planes and hangars filled the sky. And death was everywhere. The attack led to the United States' entry into World War II. Today, Pearl Harbor and the USS Arizona Memorial are the most popular visitor attractions on Oahu. On Pearl Harbor tours, visitors get to see a short film showing footage of the Japanese attack, visit an exhibit gallery featuring World War II memorabilia and have the opportunity to take a short boat ride to the sunken USS Arizona to pay their respects to the lost. Since Pearl Harbor is Hawaii’s No. 1 attraction, the waiting lines can be quite long.