South Sudan is the world's youngest nation

South Sudan, becoming the new nation in the world early Saturday formally withdraw from Sudan's civil war, two more than five decades, the cost of living of millions of people.

In the new country's capital, Juba, streets impulses of emotion. The Republic of South Sudan gained independence in 0:01.

The internationally brokered 2005 peace deal that ended more than two decades of north-south war expires at midnight Friday. That's when Sudan — which South Sudan is breaking away from — officially recognized the new country.

Former US Secretary of State Colin Powell also will attend, as will Sudanese President Omar al-Bashir, whose country already has recognized South Sudan.

The mission has drawn criticism for its failure to protect Sudanese civilians caught in violence along the north-south border and in the south, where conflict has killed nearly 2,400 people this year alone.

The UNSecurity Council on Friday unanimously approved a new peacekeeping force for South Sudan, authorizing the deployment of up to 7,000 military personnel and 900 international police, plus an unspecified number of UNcivilian staff including human rights experts.

While South Sudan is now expected to control of more than 75 percent of what was Sudan's daily oil production, it has no refineries and southern oil must flow through the north's pipelines to reach market.

Princeton Lyman, the US envoy to Sudan, said Friday that relations between the south and north will be "strained and a little rocky."

"Everyone is for peace in and between Sudan and South Sudan," said John Prendergast, founder of the Washington-based Enough Project.