Deep Inside the Titanic (01:46)
Submersibles examine the area where the iceberg hit the Titanic.
Deep Inside the Titanic (02:21)
See all that's left of the spot where the lookouts spotted the iceberg.
We Built This City (03:01)
Architecture critic Paul Goldberger explains the history and nature of the skyscraper.
Deep Inside the Titanic (01:50)
Exploring the embedded bow of the Titanic reveals the White Star logo still intact.
History (02:27)
The Italian Ministry of Foreign Affairs has sponsored a project to protect and preserve Iraqi antiques. Engineers are using lasers to recreate physical replicas of the historical artifacts.
When We Left Earth (04:02)
NASA experiences great success with Columbia. Then tragedy strikes with the explosion of the Challenger. Take a sneak peek at the design and development of the first winged space shuttle.
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