Arba’een marks 40 days after the day of Ashura and commemorates the death of Hussain Ibn Ali, the grandson of the Prophet Mohammad, who was killed alongside his family members and close companions in the city of Karbala in the year 61 after hijra. Every year, millions of pilgrims flock to Iraq to remember Imam Hussain and the stand he took against the tyrant Yazid. With numbers as high as 15 million this year, the numbers of pilgrims and observers increase every year, with not only Shia Muslims but Hindus, Christians, Buddhists, Sikhs, and others coming together to remember Imam Hussain and the lessons he taught on social justice and peace.