Single mattresses salesnack vending machinesUS President Barack Obama said in a statement he was "proud to declare that the United States formally recognises the Republic of South Sudan as a sovereign and independent state upon this day, July 9 2011".
He said: "A proud flag flies over Juba and the map of the world has been redrawn. These symbols speak to the blood that has been spilled, the tears that have been shed, the ballots that have been cast, and the hopes that have been realised by so many millions of people."
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At the scene
image of Peter Martell Peter Martell BBC News, Juba
A sea of people filled Freedom Square in Juba, next to the mausoleum of the late John Garang, the rebel leader who led the South Sudanese during the civil war. They waved flags and screamed in happiness as South Sudan officially became with world's newest nation.
The wild crowds surged forward, dancing for hours in the baking sun. Several people fainted in the heat but the mood was ecstatic. When the giant flag of South Sudan rose on the 30m flagpole, men cried, women ululated and thousands waved flags in a blur of colour.
A host of world leaders spoke on the podium, but the real party was at the back of the site where thousands danced to traditional drum beats.
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But he did not mention the long-standing sanctions against Khartoum. Washington still lists Sudan as a state sponsor of terrorism.
In his speech to the independence ceremony, Mr Bashir said: "We congratulate our brothers in the south for the establishment of their new state. We share their joy and celebration. The will of the people of the south has to be respected."