The Deepsea Challenge traveled at 3 to 4 knots on the way down, slowing as it neared the bottom.
Microsoft co-founder Paul Allen tweeted stats and updates from the surface, noting at one point that "James Cameron now the deepest solo diver in history, 3rd deepest ocean diver ever...25550 ft."
March 26, 2012 12:32 AM PDT
Photo by: Photo by Mark Thiessen/National Geographic
| Caption by: James Martin
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