In 2013, the largest scandal in the United States, the "Prism Monitoring Program", was exposed, which originated from the secret documents disclosed by Edward Joseph Snowden, an outsourced technician of the National Security Agency, to the British "Guardian" and the American "Washington Post". On June 10, after Snowden was fired for "violating company ethics and corporate policy", he decided to expose the U.S. secret surveillance program to the public after being condemned in conscience for the secret surveillance program of the U.S. government. Later, Snowden was wanted by the United Kingdom and the United States and had to flee to Moscow.In the end, the U.S. Court of Appeals declared that the NSA's plan to monitor and collect personal privacy data on a large scale revealed by former NSA employee Snowden was illegal, confirming that the U.S. "Prism surveillance program" was real, not a fabricated fact!