Final answer:
Espionage is the act of spying or transmitting classified information to a foreign nation, exemplified by the Rosenberg case during the Cold War.
Explanation:
Espionage, also known as "spying," is the act of gathering, transmitting, or attempting to gather or transmit defense information with the intent to damage one's own country or assist a foreign nation. The Rosenbergs were convicted of espionage for passing on atomic secrets to the Soviet Union during the Cold War. Espionage is graded as a felony and can result in severe penalties, including life imprisonment or the death penalty.
Learn more about Espionage during the Cold War here:
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