Robert Hanssen, a former FBI agent who turned into a spy for Russia and did significant damage to U.S. national security, was found dead in his prison cell on Monday. He was 79 years old.“On Monday, June 5, 2023, at approximately 6:55 am, inmate Robert Hansen was found unresponsive at the Federal Correctional Complex (FCC) specifically, the ADX in Florence, Colorado,” the Bureau of Prisons said in a statement. “Responding staff immediately initiated life-saving measures. Staff requested emergency medical services and life‑s …