The Titanic sunk on April 15, 1912, and has remained a famous incident in world history ever since.
AP Photo/Library of Congress
This May 31, 1911, photo provided by the Library of Congress, shows the hull of the S.S. Titanic. under construction in dry dock. The tragic sinking of the Titanic nearly a century ago can be blamed on low grade rivets that the ship's builders used on some parts of the ill-fated liner, two experts on metals conclude in a new book.