Brazilian President Luiz Inacio Lula da Silva opens a G20 summit in Rio by launching an alliance to curb world hunger. "This alliance was born of the G20, but it is global. Let this summit be marked by the courage to act," Lula tells leaders of the biggest economies. The Global Alliance Against Hunger and Poverty marks an early summit success for left-wing Lula, with a total of 81 countries signing on to it. IMAGES AND SOUNDBITES TO COMPLETE VIDI36MK3VM_EN AND VIDI36MQ3GH_EN