Think you know history? What about these major events, contrived to cover for top secret operations. 

Ready  for the real story? Everything from scientific research and oil and gas  drilling can and have been used as a cover for clandestine exploration  of the deep sea and underground environments.

The discovery of the Titanic wreckage and  the Glomar Explorer are two such examples, remarkable because of the  high profile press celebration of the achievements operating as cover  for a larger secret. So what really goes on?