Millions of Iranians are partaking in nationwide processions on Tasu'a, the 9th day of the Muslim month of Muharram, a day before the martyrdom anniversary of Imam Hussein, the third Shia imam. Shia Muslims hold mourning ceremonies during the first 10 days of Muharram to remember Imam Hussein and his 72 companions, who were all martyred after fighting thousands of soldiers of the ruling tyrant of the time, caliph Yazid ...