Security guards gesture to the media to stop taking photographs as North Korea's top nuclear negotiator Kim Kye Gwan arrives at the U.S. Embassy where he will meet with U.S. Assistant Secretary of State Christopher Hill for a meeting on Tuesday April 8, 2008 in Singapore. The United States and North Korea opened a new round of talks Tuesday to resolve a deadlock over the communist nation's nuclear programs, amid warnings by Washington that time was running out. (AP Photo/Wong Maye-E)

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