Fiction 5 Americans -- 3 Meteors -- 3 Scientists -- 3 Secret societies 3 Crimes against 2 Cryptographers 2 more ... Fiction -- 2 Physicists -- 2 Religious educators 2 Signs and symbols 2 Art museum curators -- 1 Computer security -- 1 Conspiracies -- 1 Crime against 1 Crytographers -- 1 Election -- 1 Fiction. -- 1 Freemasonry 1 Grail 1 Intelligence officers -- 1 Langdon, Robert (Fictitious character) 1 Presidents -- 1 less ...