By Newsbreak Producer Shanell Daniel - The sustainability of a possible Government of National Unity (GNU) has come into question after the ANC, DA, IFP and Patriotic Alliance formed part of a unity government. According to political analyst, Professor Bheki Mngomezulu only time will tell if the parties are able to work together long term - considering their different views on governance. Although GNU partners have signed a statement of intent, they still have to meet to finalise the details of how it will operate. Prof. Mngomezulu says suddenly becoming partners could affect the parties internally and risk the sustainability of a Government of National Unity...