Busan, South Korea, Nov 18, SPA -- Asia-Pacific leaders called onEurope to be more flexible at world trade negotiations asthey opened an annual summit Friday, warning crucial talksnext month on freeing markets could be the last chance tomake progress toward that goal anytime soon. "We're basically saying that now the ball is in Europe'scourt," South Korean Foreign Minister Ban Ki-moon toldjournalists after leaders of the 21-member Asia PacificEconomic Cooperation forum started a two-day summit in theport city of Busan. As the leaders met, rock-throwing protesters clashed withriot police who sprayed them with high-powered water hosesabout 500 meters (yards) from the summit venue. Thedemonstration was on the other side of a river from thesummit, which wasn't interrupted in any way, The Associated Press reported. At the meeting, leaders including U.S. President George W.Bush, Chinese President Hu Jintao, Japanese Prime MinisterJunichiro Koizumi and Russian President Vladimir Putinlaunched a bid to revive the stalled global free tradetalks while pledging unity in combatting bird flu andterrorism.--MORE1349 Local Time 1049 GMT www.spa.gov.sa/303527