April 4, 1912: The Titanic leaves Southampton, England, on her ill-fated first voyage. Southampton City Council /AFP/Getty Images hide caption

Titanic: Voyage To The Past
The $7.5 million vessel sank after striking an iceberg in the north Atlantic, claiming 1,517 lives.Laurie and Dan Castaneda from Long Beach, Calif., walk the pool deck of the Azamara Journey on a Titanic Memorial Cruise. Preparation for their costumes involved several weeks of research, last-minute purchases and even home-sewn clothing from vintage patterns. Richard Drew/AP hide caption
Tennis shoes lay on the beach on Terschelling island, Netherlands, Feb. 10, 2006. They were from a shipping container that fell off a ship during a storm. Marleen Swart/AP hide caption
Surviving officers of the Titanic recalled ship's doctor John Edward Simpson as perfectly calm in the face of death, even giving his pocket flashlight to one of the lifeboat captains. Courtesy of Kate Dornan hide caption
Celine Dion sings "My Heart Will Go On" at the 1998 Academy Awards. Timothy A. Clary/AFP/Getty Images hide caption
The cast and crew of Titanic, as pictured in my 2001-2002 yearbook. I'm standing in the third row back on the right side, in front of the "captain." Courtesy of Dana Farrington hide caption
Portraits of Wallace Hartley (top center) and the other musicians aboard the Titanic, published after the ship sank in 1912. Wikimedia Commons hide caption
The bow railing of RMS Titanic, illuminated by the Mir 1 submersible. Read more about the wreck in a National Geographic report. Emory Kristof/National Geographic Stock hide caption
The ill-fated Titanic rests at Harland and Wolff's shipyard, Belfast, in February 1912. Topical Press Agency/Getty Images hide caption
James Cameron's 1997 epic Titanic is being rereleased in 3-D. Paramount Pictures/AP hide caption
The Titanic, which sank 100 years ago in April. Central Press/Getty Images hide caption
Currency is among the artifacts salvaged from the wreck of the Titanic. Stanley Leary/ASSOCIATED PRESS hide caption
White Star Line heir J. Bruce Ismay was one of 325 men to survive the sinking of the Titanic.
Hulton Archive/Getty Images hide captionA London newspaper boy sells copies of the Evening News with a story about the sunken ship. Topical Press Agency/Getty Images hide caption