Monica Witt stepped off a plane in Tehran in late August 2013 and began a new life. No matter how hard the United States Air Force veteran has tried, however, she can’t fully escape her past.The U.S. government won’t let her.Six years after Witt defected, a federal grand jury in Washington, D.C., indicted the former counterintelligence officer on February 8, 2019, and charged her with espionage and other crimes for supplying Iran with top-secret…