Leaders from 21 different countries arrive in Yokohama for Asia Pacific Economic Cooperation Summit starting this evenng. Free trade and the state of the global economy will dominate the two-day meeting. A proposed regional free trade zone and measures aimed at putting the global economy on track will be the priorities for the APEC leaders in Yokohama. They are meeting on the heels of the G20 summit in Seoul, where trade imbalances and currency strains dominated discussions among leaders of the biggest economies.Meanwhile, US President Barack Obama wraps up his 10-day Asia tour with a stop in Japan. The president has arrived in Tokyo but he will be spending the next few days in Yokohama, where he meets with leaders from APEC countries.