A fictional B-29 Superfortress crashes into a lake in Nevada in the action-packed opening scene in Aegis Incursion (book two of the Aegis League Series).
In the picture here (from http://www.brettseymourphotography.com), an actual B-29 is shown at the bottom of Lake Mead. It crashed into the lake on a clear blue day in July 1948, remaining lost for half a century. It was apparently on a secret research mission to carry out atmospheric tests.
Aegis Incursion will be available in Nov/Dec 2014. Check out www.aegisnovel.com for updates.