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Expo 2012 Yeosu Official Opening Ceremony Takes Place

YEOSU, SOUTH KOREA - MAY 11: The Big O - Marine Cultural Space, a giant circular strucure with lasers and a light show during the opening ceremony of the 2012 Yeosu Expo on May 11, 2012 in Yeosu, South Korea. More than 105 countries, 10 International Organizations and 10 million visitors are expected to participate in the expo that will open to the public on May 12 to August 12. (Photo by Chung Sung-Jun/Getty Images)

Expo 2012: South Korea

Expo 2012 has opened in South Korea's coastal city of Yeosu for a three-month run. The fair, which kicked off Saturday, May 12, has the largest number of robots in the history of expos, including a robot fish that explores underwater resources in an environment-friendly way.