IRNA Head of the Atomic Energy Organization of Iran (AEOI) Ali Akbar Salehi left here on Thursday for two European countries. Salehi's first European visit will be to Rome, Italy, that is taking place at the invitation of the Italian officials. In Rome, Salehi is to address Amaldi international seminar, visit nuclear sites there and hold talks with the Italian officials. Then, the AEOI head will depart for London, UK, at the invitation of the British Foreign Secretary Boris Johnson.