Aldrich Ames, a former CIA officer known as a double agent who sold U.S. secrets to the Soviet Union and Russia, has died in a Maryland prison at age 84. Ames, who served 31 years with the CIA, admitted to being paid millions for classified information, including the identities of Western agents. His betrayals are blamed for the executions of several agents and were considered a major setback for U.S. intelligence during the Cold War. He pleaded guilty to espionage and tax evasion and was serving a life sentence without parole.