Egypt's President Abdel Fattah al-Sisi will participate Sept. 25 in the 70th Session of UN General Assembly at its headquarters in New York, Al-Bawaba News reported Tuesday. The second week of the UN session is scheduled to witness the adoption of a development agenda post 2015 at a plenary meeting. The participation of al-Sisi and other world leaders will be from 25 to 27 September. The UNGA is the democratic heart of the UN, its a forum for decision-making where all 193 member states each have a single vote. The general assembly has a range of vital decisions to make within the UN system. Most importantly, it is the main global forum for discussing international political cooperation, threats to peace and economic development, as well as the huge range of social, humanitarian and cultural issues that come under the remit of the UN.