Seeming as benign as Casper the Friendly Ghost, these gleaming, motorized white forms welcomed visitors to the Pepsi-Cola Pavilion at the Expo '70 in Osaka.

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The revision came days before the opening of the six-month Shanghai World Expo, which organizers expect will draw more than 70 million people.

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I'm not sure yet what my schedule is going to be, but I'm very pleased that we're going to have an excellent U.S. pavilion at the Expo, and I understand that we expect as many as 70 million visitors here.

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