Levinson was on a mission that U.S. intelligence officials later described as a rogue CIA operation that led to a shake-up in which three people were forced out of their jobs at the agency.
The CIA ultimately concluded it was responsible for Levinson while he was in Iran and paid millions to his wife as compensation for income lost as well as the cost of renewing his contract.
"We know that the FBI considers this case a top priority, but our nation's leaders must ensure that a whole government approach and a comprehensive international effort are used to locate him and bring him home," said Ellen Glasser, president of the Society of Former Special Agents of the Federal Bureau of Investigation. "Eight years without answers is unacceptable."
Read the full story here.