A team of scientists, engineers and imaging experts have joined forces to answer one of the most haunting questions surrounding the legendary disaster: Just how did the “unsinkable” ship break apart and plunge into the icy waters of the North Atlantic on April 15, 1912? HISTORY took part alongside the world’s top underwater experts in the most thorough and exhaustive study of the wreck ever made. The undertaking yielded unprecedented new discoveries and the first comprehensive map of Titanic’s watery grave. This 2-hour special documents this mission, captures the high-tech mapmaking process, unveils astonishing pieces of never-before-seen wreckage and presents the expedition’s unexpected findings.