President E.D Mnangagwa is hosting a SADC Organ Troika Summit on Mozambique this Tuesday.   Mozambique President Filipe Nyusi, Zambian President Edgar Lungu and Botswana President Dr Mokgweetsi Masisi have already arrived in Zimbabwe for the meeting.   They were welcomed at the Robert Mugabe International Airport by Foreign Affairs Minister Sibusiso Moyo and Mines Minister Winston Chitando.