Under the guidance ofthe Ameer of Hizb ut Tahrir, Eminent Scholar, Ata Bin Khalil Abu Al-Rashtah, may Allah protect him, the Central Media Office of Hizb ut Tahrir has launched a widespread global campaign marking the occasion of the Hijri Anniversary of the Conquest of Constantinople (city of Heraclius) which was besieged from the 26th of Rabii’ al-Awwal until the 20th Jumada al-Awwal 857 AH corresponding to 5 April until…