Bush defends decision to hold next month 's Olympics opening ceremony . Bush attended as the leaders arrived in Japan ahead of summit starting day . Climate change was to be focus of three - day summit . G-8 leaders also expected to discuss global economy , Zimbabwe .
Bush defends decision to attend next month 's Olympics opening ceremony . Bush spoke as G-8 leaders arrived in Japan ahead of summit starting Monday . Climate change expected to be focus of three-day summit . G-8 leaders also expected to discuss global economy , Zimbabwe .