Senior representatives of the world's powerful countries and regional powers to end

Syria's bloody civil war, peace efforts on Tuesday to hold talks in Vienna again. US Secretary of State John Kerry and Russian Foreign Minister Sergei Lavrov will preside over the meeting. Syria comprising 17 countries of the International Support Group  nationwide hostility from the meeting to an end and blocked humanitarian access to the area to be called upon quickly. Kerry's tour with US officials in Washington on Assad's departure from power is still firm.