The deep sub Alvin, past and future.
Bluefin CEO David Kelly, Richard Quest, Bob Ballard discuss the underwater search for Malaysia Airlines Flight 370.
CNN's Zain Verjee talks to Titanic discoverer Bob Ballard about the National Geographic documentary highlighting his work.
Bob Ballard is one the world's most accomplished deep-sea explorers, having found the final resting places of the Titanic, the Bismarck and John Kennedy's PT boat. Lara Logan and "60 Minutes" cameras are there for Ballard's expedition off the coast of Turkey as he makes a major discovery on the bottom of the Aegean Sea.
Watch Bob Ballard describe his upcoming Nautilus expedition. The crew will begin the voyage in the Black Sea searching for antiquities and exciting geology. Then they'll look at undersea volcanoes north of Crete, and more!
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