U.S. Nuclear Secrets
Perhaps, this is notably the most highly protected information in the world. The nuclear facilities by themselves are a secret and only specific people know where they are located. The nuclear launch codes are the most secretive information of the U.S. government, such that only top officials in the U.S. department of defense have access to these codes. The amount of nuclear weapons and the type of nuclear weapon that USA possesses remain undisclosed to the public. The public will never get to know of the nuclear information.
As a super power, it is clearly understandable why the U.S government keeps the information a secret. Anyone who can access the information by illegal means will certainly put his life in danger. The information is highly guarded for security purpose against any rival nuclear country. This poses a big concern of what would happen if a nuclear war emerged. God forbid!
