WATCH: 'Iran already knows how to make a nuclear warhead,' expert warns

WATCH: ‘Iran already knows how to make a nuclear warhead,’ expert warns

Following recent threats made by Iran and the U.S.’ deployment of an aircraft carrier to the Persian Gulf, Dr. Emily Landau of the Institute for National Security Studies (INSS) in Israel warned that the Islamic Republic’s development of an operable nuclear weapon may only be a matter of time.