Iran is marking 31 years of the return of Ayatollah Ruhollah Khomeini to the country that triggered the Islamic Revolution.<br /><br />Ten days of celebrations, known as the Fajr festival, are being held.<br /><br />Hundreds of people gathered at the shrine of Khomeini, the leader of the revolution, on Monday.<br /><br />Al Jazeera's Nazanine Moshiri reports from the cemetery in the capital, Tehran.