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Some documents that were leaked contained sensitive references to foreign heads of state. This could anger them into taking revenge on us, or worse. So to answer your question, yes, WikiLeaks can very well be a threat to U.S. National Security.
When aggregated the classified information's classification level may increase/rise.
national unity
Top Secret is the security classification used when contents could reasonably be expected to cause damage to national security.
Top Secret is the security classification used when contents could reasonably be expected to cause damage to national security.
Top Secret is the security classification used when contents could reasonably be expected to cause damage to national security.
Top Secret is the security classification used when contents could reasonably be expected to cause damage to national security.
Because he was a communist dictator that allowed the Russians to build nuclear weapons in Cuba that could easily reach key targets in the United States. See "Cuban Missile Crisis."
Because it could be a security threat i'm guessing.
top secret
Secret information could reasonably be expected to cause serious damage to national security in the event of unauthorized disclosure.
Top secret information refers to sensitive data that, if disclosed or compromised, could pose a significant threat to national security or other critical interests. This level of classification is typically reserved for the most highly classified and closely guarded information within a government or organization. Access to top-secret information is restricted to only those with appropriate security clearance and a legitimate "need to know."