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United States Under Secretary of State for International Security and Arms Control John Bolton listens to a question during a press conference in Beijing 20 January 2003. The US pressed ahead with its diplomatic drive to end the North Korean nuclear crisis as Bolton held talks with Chinese leaders, including vice foreign ministers Wang Guangya and Li Zhaoxing, despite Pyongyang's rejection of global diplomatic efforts to harness its nuclear program. / AFP PHOTO / GOH Chai Hin (Photo credit should read GOH CHAI HIN/AFP via Getty Images)

United States Under Secretary of State for International Security and Arms Control John Bolton listens to a question during a press conference in Beijing 20 January 2003.  The US pressed ahead with its diplomatic drive to end the North Korean nuclear crisis as Bolton held talks with Chinese leaders, including vice foreign ministers Wang Guangya and Li Zhaoxing, despite Pyongyang's rejection of global diplomatic efforts to harness its nuclear program.                               / AFP PHOTO / GOH Chai Hin        (Photo credit should read GOH CHAI HIN/AFP via Getty Images)