Add to ORKGSecrets and information, what do they have in common? A secret is something you don’t want anyone to know, something you keep to yourself or those you trust. “Knowledge obtained from investigation” is the definition of information, according to Webster’s Dictionary. As a new government documents librarian, my interest was piqued by the subject of secrecy. As I looked for information on this topic, I thought information that exposed the vulnerabilities of the United States to a terrorist attack or gave away our technology secrets would be classified. I didn’t know that something could be classified at first, declassified, and then classified at a later time. In this article I will discuss the types of material that are unavailable to the pub...