The life of Umar Ibn Al-Khattab, the second Caliph of Rashidun Caliphate, before and after he embraces in Islam.The life of Umar Ibn Al-Khattab, the second Caliph of Rashidun Caliphate, before and after he embraces in Islam.The life of Umar Ibn Al-Khattab, the second Caliph of Rashidun Caliphate, before and after he embraces in Islam.