Oman's Chief of Staff of Armed Forces General Ahmed bin Hareth Al-Nabhani received a written message addressed to him from his Qatari Counterpart Major General Hamad bin Ali Al-Atiyyah inviting him to attend the International Maritime Defense Expo 2012 which will be held in Qatar in this month, March. The message was delivered by Qatari ambassador to the Sultanate of Oman Abdullah Mohammed Al-Khater during his meeting with General Al-Nabhani in Muscat today.