An Iranian-American with ties to the People 's Mujahedeen of Iran announces the find . He says Iran uses the site to make parts for centrifuges used to enrich uranium . Comment:
An Iranian-American with ties to the People 's Mujahedeen of Iran announces the find . He says Iran uses the site to make parts for centrifuges used to enrich uranium . The United States is aware of the facility , a U.S. official tells CNN .