The shimmering blue surface of a giant Nevada lake has concealed a sunken mystery for nearly 70 years, which a drought parching the southwest may soon help reveal. Beneath the waters of man-made Lake Mead lies a B-29 bomber that went down carrying a top-secret missile defense system that may have actually caused the crash. The aircraft was known as the Superfortress and was the same model as the Enola Gay and Bockscar planes that dropped atomic bombs on Japan. A diver at the wreck of the B-29. Recreational divers will soon be able to explore it for themselves
@highlight
Aircraft, known as the Superfortress, crashed into Lake Mead in June 1948
@highlight
Was carrying an experimental sun-powered missile guidance system
@highlight
Testing it required 35,000 feet ascents followed by descents to just 100 feet
@highlight
The sun may have reflected off the lake's surface, causing Captain Robert Madison to lose depth perception and crash into the water
@highlight
Wreckage was 300 feet down but is now just 110 feet following drought
@highlight
Recreational divers have been banned from exploring it but this is likely to be lifted soon, meaning the wreckage's secrets could be fully revealed
The wreck was discovered in 2001 in @placeholder's Overton Arm section, accessible to better-equipped divers