In 1999, a secret report revealed decades of nuclear espionage against the United States
A massive security breach came to light when a congressional committee revealed that foreign agents had spent twenty years systematically acquiring America's most sensitive thermonuclear secrets and satellite technologies.
In May 1999, the U.S. House of Representatives released the Cox Report, a damning document detailing two decades of systematic nuclear espionage by China. The report concluded that China had obtained design information for the United States' most advanced thermonuclear weapons, including the W-88 warhead.
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