According to the classification standards, what is the highest designation for US classified information?

The highest designation for U.S. classified information is Top Secret. This classification level is reserved for information that, if disclosed without authorization, could cause "exceptionally grave damage" to national security. The classification system is structured hierarchically, with Top Secret at the top, followed by Secret and Confidential. Each level signifies the potential impact of unauthorized disclosure on the nation’s security interests, with Top Secret representing the most sensitive information. Therefore, understanding the implications and the reasons for this classification is critical for anyone involved in handling classified material.