Workmen stand next to the screws of the RMS Titanic at a shipyard in Belfast, Northern Ireland. The New York Times

The hulls of the RMS Titanic, left, and of her sister ship, the RMS Olympic, are surrounded by construction scaffolding at a shipyard in Belfast, Northern Ireland. The New York Times

The Titanic departs Belfast on April 2, 1912 for its first sea trial. Eight days later it began its maiden and final voyage. Palm Beach Post files

Workers leave the Harland Wolff Shipyard in Belfast, where the Titanic was built. The ship is visible in the background of this 1911 photograph. Harland Wolff CollectionCox Newspapers

Two views of the grand staircase between the boat deck and the promenade deck aboard the RMS Titanic in undated photos. The New York Times

Two views of the grand staircase between the boat deck and the promenade deck aboard the RMS Titanic in undated photos. The New York Times

First class accommodations aboard the RMS Titanic in an undated photo. The New York Times

The menu for passengers aboard the RMS Titanic for April 14, 1912, and a second class dining room in an undated photo. The New York Times

Survivors of the sinking of the RMS Titanic are interviewed by reporters as they come off the RMS Carpathia in New York on April 18, 1912. The New York Times

The April 16, 1912 front page of The New York Times. The New York Times

A chandelier dangles from its wires in front of the opening that housed the grand staircase, and the inside of Titanics hull. Walt Disney Pictures

The skylight frame, from either the grand staircase or the aft staircase, rests on the sea floor near the stern debris field of the Titanic on June 6, 2004. Institute for ExplorationUniversity of Rhode Island

A model of the Titanic sits beside the new 160 million Titanic Belfast visitor center in Northern Ireland on March 7, 2012. The Titanic Belfast, which will open in late March, bills itself as the the worlds largest Titanic visitor experience. The center is built on a site close to the famous Harland and Wolff cranes that were used to build the Titanic, and beside the spot where the Titanic was launched in 1911. Peter MorrisonAssociated Press

Eager to hear the latest news about the sinking of the RMS Titanic, people gather outside the offices of The New York Sun, on April 15, 1912. The New York Times

Pipes and the captains bathtub rest in what remains of the captains cabin in 2003. National Ocean and Atmospheric Administration

Brett Irwin of the Public Record Office moves old plans of Harland Wolff ships from the 19th century in the Titanic Drawing Offices, situated close to the new Titanic Belfast. The plans for Titanic and sister ship Olympic were devised by Harland Wolff in this building. Peter MorrisonAssociated Pres

An iceberg, presumed to be the one that was struck by the RMS Titanic, is pictured from the deck of the cable ship Mackay-Bennett on April 15, 1912. The New York Times

A 17-ton portion of the hull of the RMS Titanic is lifted to the surface during an expedition in 1998. The piece along with 5,000 other artifacts will be auctioned as a single collection on April 11, 2012, 100 years after the sinking of the ship. RMS Titanic, Inc.Associated Press

Survivors of the RMS Titanic approach the RMS Carpathia on April 15, 1912. The New York Times

Dishes retrieved from the ocean floor stand in sand in a glass case as part of the Titanic: The Artifact Exhibit in Houston in 2002. Photos from the wreck show that dishes were found as shown after the crates they were packed in disintegrated. At right is the bell from the crows nest, on display in 2003 at the Science Museum in London. The bell was rung by seaman Fredrick Fleet to warn that an iceberg was ahead on the ill-fated voyage. Associated Press

The hull of a ship is displayed in the Cave area, and a worker adds the finishing touch to one of the walkways in the Titanic Belfast visitor center on March 13. Peter MorrisonAssociated Press

Lifeboats which carried survivors from the RMS Titanic are uploaded to the RMS Carpathia in the hours after the disaster. The New York Times

Survivors of the sinking of the RMS Titanic rest on the deck of the RMS Carpathia on April 15, 1912. The New York Times

A chronometer from the bridge was displayed at the Science Museum in London in 2003, and a 13-foot by 30-foot portion of the hull, with portholes that looked into first class cabins on Titanics C deck, was part of the Titanic: The Artifact Exhibition at the Metreon in San Francisco in 2006. Associated Press

Eager to hear the latest news about the sinking of the RMS Titanic, people gather outside the offices of the White Star Line in New York on April 15, 1912. The New York Times

Survivors of the sinking of the RMS Titanic rest on the deck of the RMS Carpathia on April 15, 1912. The New York Times

People gather in New York to await the arrival of survivors of the sinking of the RMS Titanic aboard the RMS Carpathia on April 18, 1912. The New York Times

This currency is part of the artifacts collection that will be auctioned on April 12. Stanley LearyAssociated Press

Some of the items found in the wreckage of the Titanic that will be auctioned April 12, 2012: a hat, glasses and a bracelet recovered from the ocean floor. RMS Titanic, Inc., Associated Press

Crew members who survived the sinking of the RMS Titanic are given dry clothing in New York on April 18, 1912. The New York Times

A poster prepared by the White Star Lines New York office to promote the RMS Titanics return trip from New York, scheduled for April 20, 1912. The New York Times

The gymnasium aboard the RMS Titanic in an undated photo. The New York Times

Officers who survived the sinking of the RMS Titanic are pictured in an undated photo. From left: Fifth Officer Harold G. Lowe, Second Officer Charles H. Lightoller, Third Officer Herbert J. Pitman seated and Fourth Officer Joseph G. Boxhall. The New York Times

Captain Arthur Henry Rostron is presented with an award by Margaret Brown, a survivor of the RMS Titanic sinking who later came to be known as The Unsinkable Molly Brown, in this undated photo. Rostron was honored for his efforts as commander of the RMS Carpathia, which rescued many of the Titanic survivors from the north Atlantic Ocean and ferried them to safety in New York. The New York Times

The funeral procession of John Jacob Astor IV, who died in the sinking of the RMS Titanic, enters Trinity Church Cemetery in upper Manhattan in May 1912 photo. The New York Times

The Titanics bow rests two-and-a-half miles under the North Atlantic. Emory KristofNational Geographic Society

This undated family photograph shows Dr John Edward Simpson. The descendants of Dr. Simpson, who died on the Titanic, said on March 12, 2012 they are delighted that a letter he penned days before the ship sank will return to his hometown, Belfast. Simpsons family had appealed for a benefactor to buy the note, which was put up for auction in Long Island, New York. It did not meet the reserve price of 34,000, Philip Weiss Auctions said, but a buyer who did not want to be named then bought it for an undisclosed sum after hearing about the familys campaign to bring the letter to Belfast for public display. Simpsons great-nephew John Martin said the note will soon return to the Northern Irish city, where the Titanic was built. Press Association