The Titanic is one of the most famous shipwrecks on the seafloor, but for decades following the 1912 disaster, its debris remained undetected. It took a secret Cold War Navy mission to find two unrelated vessels to finally pinpoint the doomed ship's location.
Now, the history of the Titanic's discovery is the subject of “Titanic: The Untold Story," a new exhibit at the National Geographic Museum in Washington D.C. In 1985, U.S. Navy commander and National Geographic Explorer-at-Large Robert Ballard was commissioned by the Navy to use a submersible to find the wreckage of two nuclear submarines. The USS Thresher and the USS Scorpion both went down in the North Atlantic Ocean during the Cold War, and the U.S. government wanted to know why the ships sank, as well as what impact their nuclear reactors had on the environment.