The FBI is offering a $200,000 reward for information leading to the arrest and prosecution of former US Air Force counterintelligence specialist Monica Elfriede Witt, who is wanted on espionage charges related to Iran, the bureau announced.Witt, 47, was indicted by a federal grand jury in February 2019 on charges including transmitting national defense information to the Iranian government. She remains at large.The FBI said Witt defected to Iran in 2013 and is believed to have provided