A World War II Japanese submarine last seen before it was sunk in 1946, was discovered on August 1 off the island of Oahu by a submersible operated by the Hawaii Undersea Research Laboratory (HURL). The I-400 was scuttled by US forces after it was captured at the end of the war to prevent it falling into Soviet hands. Footage released by HURL on December 2 shows the first glimpse of the 400 foot long submarine in 67 years. Credit: Youtube/Hawaii Undersea Research Lab