Carnegie Foundation, says he hasn’t been back to Iran for a visit since the 1979 revolution. He said that is “not because I don’t want to, [but] because I don’t believe in dual citizenship. They won’t allow me to go without an Iranian passport.” Gregorian, 77, also said that the US position in the world is threatened. “The challenge is so great, not because we’re falling behind; the rest of the world is catching us. They’re not dumb.”