The three steam-powered propellers of the RMS Titanic in dry dock in a undated photograph.
Built in Belfast by the Harland & Wolff shipyard, the Titanic was intended to be the largest, most luxurious and safest ship in the world. Instead, it became the 20th century's most vivid symbol of how overconfidence can lead to tragedy.
The Titanic's collision with an iceberg sunk "the unsinkable ship" on April 15, 1912, leaving more than 1,500 people dead. One hundred years later, we look at some of the titanic failures in human efforts to stay afloat.
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