Police officers use fire extinguishers while conservative protesters burn North Korean flags during a rally to denounce North Korea's missile threat and to welcome U.S. Secretary of State Hillary Clinton's visit near the U.S. embassy in Seoul February 20, 2009. Clinton on Friday told North Korea to stop being provocative and return to talks on ending efforts to build a nuclear arsenal. REUTERS/Jo Yong-Hak (SOUTH KOREA)
REUTERS/JO YONG-HAK